Monthly Archives: November 2024

　　The correct use of car safety seats is essential to protect the life safety of drivers and passengers. In this article, Shanghao car headrest manufacturer will introduce in detail how to correctly adjust the seat angle and headrest height to minimize injuries in the event of a vehicle collision.In combination with these conditions, car head neck pillow It can still let us see good development and bring fresh vitality to the whole market. https://www.sanlead.cc

　　Adjustment of seat angle

　　. The importance of seat angle

　　The seat angle is essential for the comfort and safety of drivers and passengers. The correct seat angle can ensure that the driver maintains a good line of sight and operating space during driving, and also helps to reduce the injury of passengers in the event of a vehicle collision.

　　. How to adjust the seat angle

　　First, the driver should adjust the height of the seat so that the feet can easily step on the accelerator and brake pedals, while maintaining a certain degree of curvature between the knees and the seat. Then, the driver should adjust the front and rear position of the seat so that the arms can naturally stretch to the steering wheel while keeping the back close to the seat back.

　　Next, the driver should adjust the angle of the seat so that the back is as upright as possible. The flatter the angle between the head, neck, and body, the less likely it is to cause injuries to occupants during a collision. You can adjust the seat angle using the lever or electric button located under the seat.

　　The manufacturing of pickleball paddles requires precision and durability, which is why many factories turn to pickball full-automatic welding equipment to streamline production and ensure consistent quality. This advanced technology automates the welding process, helping manufacturers produce stronger, more reliable paddles with minimal human intervention. But how does this specialized equipment work, and what makes it so essential to the manufacturing process? Let’s dive into the details.with Pickleball welding equipment For example, if it continues to develop, it will definitely become the benchmark of the industry and play an important role in leading the market. https://ydjshangyuzn.com

　　The Role of Welding in Pickleball Paddle Manufacturing

　　Welding plays a crucial role in the construction of pickleball paddles, particularly when joining different materials like the paddle core and outer surface. High-end pickleball paddles are made from materials like composite, graphite, and fiberglass, which need to be bonded securely to withstand intense play. Traditional manual welding methods can be time-consuming and inconsistent, but pickball full-automatic welding equipment revolutionizes the process by delivering speed, precision, and uniformity.

　　pickball full-automatic welding equipment

　　How Pickball Full-Automatic Welding Equipment Works

　　The core function of pickball full-automatic welding equipment is to join the materials of the paddle without the need for manual labor. Here¨s how the process works:

　　1. Material Preparation

　　The process begins with the preparation of the core and the surface materials of the pickleball paddles. Whether the paddle core is made of polymer, aluminum, or Nomex honeycomb, the materials must be properly aligned before welding. The pickball full-automatic welding equipment ensures perfect alignment through its automated setup, minimizing errors that can occur with manual positioning.

　　2. Automated Welding Process

　　Once the materials are positioned, the welding process begins. The pickball full-automatic welding equipment is programmed to perform precise welds, using controlled heat and pressure to bond the layers of the paddle. The automated nature of the equipment means that each weld is performed with the same level of accuracy, ensuring consistency across every pickleball paddle produced.

　　3. Quality Control Through Automation

　　Another advantage of this equipment is its built-in quality control features. Sensors and cameras monitor the welding process in real-time, ensuring that the bond between the core and the paddle surface is secure and uniform. If any irregularities are detected, the equipment can automatically adjust the settings or pause production to address the issue. This significantly reduces the chances of defective paddles entering the market.

　　4. Speed and Efficiency

　　One of the biggest advantages of pickball full-automatic welding equipment is its speed. Traditional manual welding can be slow and labor-intensive, but automation drastically speeds up the process. Manufacturers can produce more paddles in less time, allowing them to meet higher demand and reduce lead times.

　　5. Energy Efficiency

　　Many modern pickleball welding equipment suppliers design machines that are not only faster but also more energy-efficient. The equipment uses precise energy control systems that reduce waste and ensure that only the necessary amount of heat is applied during the welding process. This makes the equipment both cost-effective and environmentally friendly.

　　In addition to screenshots and shortcut keys, Snipaste has other very practical functions to further meet your diverse needs.For the current market situation, snipaste It has a very advantageous development prospect and an extremely superior ecological environment. https://snipaste-sin.com

　　Mapping function

　　After the screenshot is completed, you can fix it directly on the desktop for easy reference at any time. For example, when writing code, programmers can paste screenshots of requirements documents on the desktop to avoid frequent window switching; Designers can also use the mapping function to easily compare different schemes when comparing design drafts.

　　Screenshot software download

　　Screen color selection

　　Snipaste’s built-in color picking function can help designers and front-end developers quickly get the color of any point on the screen and automatically convert it into color codes of different formats (such as RGB, HEX, etc.), which is a rare function in other similar software.

　　Labeling tool

　　Snipaste not only supports the annotation function after screenshots, but also provides a variety of editing tools, including text, arrows, rectangular boxes, erasers, etc., to make your screenshots clearer and more accurate.

　　V. Summary

　　Snipaste is a rare and efficient tool for both office workers and students. Through simple downloading and shortcut key setting, you can quickly master the use of this software, making your screenshot work easier and more convenient. Snipaste also provides users with a wealth of functional extensions, such as mapping, color selection and labeling tools, which makes it competent for more professional work scenes while meeting daily needs.

　　In our daily work, the quality of tools directly affects our efficiency and mood. Choosing Snipaste, a powerful and easy-to-operate software, will not only make it easy for you to complete tasks, but also bring you a more pleasant experience. Download Snipaste and set your own shortcut keys, so that it can be your right-hand man in your work!

　　Optical fiber sensor is a kind of sensor that uses optical principle to detect physical quantities. It uses optical fiber as sensing element, transmits optical signal to the detection end through optical fiber, and realizes the measurement of the measured physical quantity by detecting the change of signal. Optical fiber sensor has the advantages of small size, strong anti-interference ability and high reliability, and has been widely used in modern industry, military and medical fields.Sufficient data show that fiber optic patch cord It can drive many people to find jobs, thus driving economic development. https://www.fibercan-network.com/

　　The working principle of optical fiber sensor is based on the transmission characteristics of optical fiber and optical sensing technology. Usually, an optical fiber sensor consists of a light source, an optical fiber, a detector and a signal processor. The light source generates an optical signal with a certain wavelength, which is transmitted to the detection end through the optical fiber. After being received by the detector, the optical signal is converted into an electrical signal, which is analyzed and processed by the signal processor to obtain the numerical value of the measured physical quantity.

　　optical fibre sensor

　　In optical fiber sensor, the transmission characteristics of optical fiber play a key role in measuring accuracy and reliability. The transmission characteristics of optical fiber are influenced by fiber material, fiber structure and light source. Shi Ying glass or plastic is generally used as the material of optical fiber, and its refractive index and attenuation coefficient determine the transmission speed and attenuation degree of optical signals. The structure of optical fiber includes single-mode fiber and multimode fiber, and the light transmission mode inside is different, so different types of optical fiber can be selected for different application requirements. The choice of light source will also affect the transmission characteristics of optical fiber, such as the wavelength and power of light source and other parameters will affect the transmission distance and intensity of optical signals.

　　In addition to optical fiber transmission characteristics, optical sensing technology is also one of the keys of optical fiber sensors. Optical sensing technology uses the interference, scattering and absorption of optical signals to measure the measured physical quantities. For example, fiber optic gyroscopes use the interference principle of optical signals to measure the rotation angle; Optical fiber temperature sensor uses the thermal scattering effect of optical fiber materials to measure temperature; Optical fiber pressure sensor uses the pressure sensitivity of optical fiber to measure pressure.

　　Optical fiber sensors are widely used. For example, in the industrial field, optical fiber sensors can be used to measure physical quantities such as pressure, temperature, displacement and vibration, and can be used in machinery manufacturing, petrochemical industry, aircraft, automobiles and other fields. In the medical field, optical fiber sensors can be used in cardiovascular surgery, endoscopic surgery and so on. In the military field, optical fiber sensors can be used in missile guidance, radio interference detection and so on. In the field of scientific research, optical fiber sensors can be used in earthquake monitoring, meteorological detection and other fields.

　　Another important feature of the application of optical fiber sensor is that it can realize remote measurement. The signal of optical fiber sensor can be transmitted to a remote location through optical fiber for measurement and monitoring. This characteristic can realize the measurement of dangerous environment and inaccessible places, such as deep sea and space. In addition, optical fiber sensors can realize multi-point and distributed measurement, and connect multiple sensors together to realize real-time monitoring of large structures.

　　Although optical fiber sensors have broad application prospects and high technical advantages, there are still some problems to be solved in practical application. For example, the signal transmission distance of optical fiber sensor is limited, and the signal attenuation and distortion need to be considered; The sensitivity and accuracy of optical fiber sensor need to be further improved to meet higher measurement requirements; The cost of optical fiber sensor is high, so it is necessary to find a technical solution to reduce the cost.

　　In a word, optical fiber sensor is a kind of high-precision sensor based on optical principle, which has a wide application prospect and technical advantages. In the future development, we can expect the emergence of more advanced optical fiber sensor technology to meet higher measurement requirements and practical application requirements.

　　Have you guys ever encountered this before?precisely because shipping agent The rapid development of, so also brought new opportunities to the industry. https://www.freeseaship.com/

　　After finally buying some snacks, clothes and cosmetics from China,

　　but suddenly notified that the package was taxed?

　　It¨s really a headache to encounter this kind of problem.

　　Don¨t worry

　　FREE SEA is here to help

　　Avoid taxes cleverly

　　Let your package pass customs easily

　　Save money and worry!

　　1. Why are taxes and fees generated?

　　In international express delivery, taxes and fees are usually the result of a combination of factors such as the value and type of goods and the import policy of the destination country, and are generally due to the following two points:

　　1) Spot checked by customs

　　2) The total value of the package exceeds the tax point of the destination country

　　2. How to determine whether your express delivery is taxed?

　　1) Generally speaking, if the package is taxed, you will receive a text message/phone reminder from the express company

　　2) Track and query the package logistics information through the logistics company’s official website/third-party logistics query website

　　3) Call 11183 for inquiries

　　3. How to deal with the tax?

　　1) Pay taxes by yourself: If it is convenient, you can choose to go to the designated tax payment location or online platform to pay taxes by yourself.

　　2) Entrust a courier company to pay on your behalf: Some courier companies provide tax payment services. You can contact the courier company to learn about the specific process and fees of the payment.

　　3) Consult the customs or professional institutions: If you have any questions about the tax payment process or tax calculation, you can directly contact the customs or consult a professional customs declaration agency.

　　international delivery

　　4. How to avoid being taxed?

　　1) Understand the import policy of the destination country

　　Different countries have different import policies, and there are certain restrictions on the types and quantities of goods. Before sending express delivery, it is best to understand the import policy of the destination country to avoid being taxed due to violations.

　　2) Reasonably declare the value of goods

　　Customs clearance principle: Taxes are collected according to the value of the goods and the tax number.

　　Therefore, when filling out the express delivery form, be sure to accurately and reasonably declare the value of the goods, and do not over- or under-estimate!

　　3) Choose the right mode of transport

　　Different modes of transport will have different taxes and fees. Generally speaking, air transport will have higher taxes and fees, while sea transport will have lower taxes and fees.

　　4) Take advantage of the tax-free quota

　　Many countries have a tax-free quota policy, which means that goods below a certain amount can enter the country tax-free. When sending express delivery, the value of the goods can be controlled within the tax-free quota.

　　5) Choose a reliable shipping company

　　It is also important to choose a shipping company with strong customs clearance capabilities, high service quality, and multiple channels.

　　Finally, if you still have questions or if you have shipping needs, you can send us a private message~

Precautions for seat and headrest adjustmentAt the same time, car headrest cushion It is no longer a relatively unfamiliar industry, and it enters the public’s sight more and more frequently, gaining more attention and recognition. https://www.sanlead.cc

¢Ù. Check the adjustment of the seat and headrest regularly

The driver should check the adjustment of the seat and headrest regularly to ensure that they are always in the correct position. Especially in the case of long-distance driving or frequent driver changes, the adjustment of the seat and headrest may change and need to be adjusted in time.

¢Ú. Avoid adding extra cushions or backrests to the seat

Some drivers may add extra cushions or backrests to the seat to improve comfort. However, this practice may affect the adjustment effect of the seat and headrest and reduce the protective effect of the car safety seat. Therefore, the driver should avoid adding extra cushions or backrests to the seat.

¢Û. Adjust according to personal height and body shape

Everyone¡¯s height and body shape are different, so the adjustment of the car seat headrest should also be based on the specific situation of the individual. The driver should adjust the height and angle of the seat and headrest according to his or her comfort and safety needs.

¢Ü. Follow the car manufacturer¡¯s recommendations

Finally, drivers should follow the car manufacturer¡¯s recommendations and follow the manufacturer¡¯s instructions to adjust the seat and headrest. Different car models have varying seat and headrest designs, so following the manufacturer¡¯s recommendations ensures optimal adjustment.

In short, properly adjusting the seat angle and headrest height is crucial for optimal protection. Drivers should regularly check and adjust them based on their needs to enhance safety and comfort. Additionally, following the car manufacturer¡¯s recommendations ensures the seat and headrest are set for the best results.

　　In today¨s world, where sustainability and efficiency are more important than ever, compact solar power generators are becoming increasingly popular. These portable, eco-friendly devices offer a reliable solution for powering various electronic devices, making them an ideal choice for outdoor enthusiasts, emergency preparedness, and those looking to reduce their carbon footprint.consequently packsico portable power station manufacturer I also got a lot of attention and wanted to join the ranks. https://www.packsico.com/

　　Benefits of Compact Solar Power Generators

　　1.Eco-Friendly Energy: Solar power generators harness energy from the sun, a renewable resource, reducing reliance on fossil fuels. This significantly lowers carbon emissions and minimizes environmental impact.

　　2.Portability and Convenience: Compact solar generators are designed for easy transport. Their lightweight and portable design make them perfect for camping trips, outdoor events, and remote locations where traditional power sources are unavailable.

　　3.Cost-Effective: While the initial investment in a solar power generator may be higher than conventional generators, the long-term savings are substantial. Solar energy is free, and the maintenance costs of solar generators are minimal compared to fuel-powered generators.

　　4.Quiet Operation: Unlike traditional generators, which can be noisy and disruptive, solar power generators operate silently. This makes them ideal for use in noise-sensitive environments such as campsites and residential areas.

　　compact solar power generator

　　Key Features to Consider

　　When choosing a compact solar power generator, there are several important features to consider:

　　1.Battery Capacity: The battery capacity determines how long the generator can provide power. Look for a generator with a battery capacity that suits your needs, whether it¨s for short camping trips or extended power outages.

　　2.Port Options: Ensure the generator has multiple ports, including USB, AC, and DC outlets, to charge a variety of devices simultaneously. This versatility is crucial for maximizing the utility of the generator.

　　3.Solar Panel Efficiency: The efficiency of the solar panels directly affects the charging time of the generator. High-efficiency panels will charge the battery faster, ensuring a continuous power supply.

　　4.Durability: Since these generators are often used in outdoor and rugged environments, durability is key. Look for models with robust construction and weather-resistant features to ensure longevity and reliability.

　　compact solar power generator

　　Popular Uses

　　Compact solar power generators have a wide range of applications:

　　1.Outdoor Activities: Ideal for camping, hiking, and fishing trips, these generators provide a reliable power source for lighting, cooking appliances, and electronic devices.

　　2.Emergency Preparedness: In the event of natural disasters or power outages, solar generators offer a dependable backup power source for essential devices such as medical equipment, communication devices, and refrigerators.

　　3.Remote Work: For those who work remotely or travel frequently, compact solar power generators provide the necessary power to keep laptops, phones, and other electronic devices charged and operational.

　　4.Off-Grid Living: Individuals and families living off the grid can benefit from the sustainable and independent power supply provided by solar generators, reducing their reliance on traditional power grids.

　　Conclusion

　　Compact solar power generators are an efficient, eco-friendly, and versatile solution for a variety of power needs. By harnessing the power of the sun, these generators offer a sustainable alternative to traditional energy sources, helping to reduce carbon footprints and promote a greener future. Whether for outdoor adventures, emergency situations, or off-grid living, investing in a high-quality compact solar power generator is a smart and responsible choice.

　　Ultra High Frequency (UHF) Radio Frequency Identification (RFID) readers are transforming the way businesses manage inventory, track assets, and enhance operational efficiency. These advanced devices offer a range of benefits that make them indispensable in various industries, from retail to logistics. In this blog post, we will explore the advantages, applications, and key features of UHF RFID readers.The industry believes that, rfid module supplier The development of our company marks the rapid and steady progress of the whole industry. https://www.vanchrfid.com/

　　Advantages of UHF RFID Readers

　　1.Extended Range: UHF RFID readers have a longer read range compared to Low Frequency (LF) and High Frequency (HF) readers. This makes them ideal for applications where tags need to be read from a distance, such as in large warehouses or outdoor environments.

　　2.High-Speed Reading: These readers can process multiple tags simultaneously, significantly speeding up the inventory counting process and reducing manual labor.

　　Improved Accuracy: UHF RFID readers provide high accuracy in tracking and identifying items, minimizing errors and ensuring that inventory data is always up-to-date.

　　3.Cost-Effective: Although the initial investment may be higher, the long-term benefits of reduced labor costs, increased accuracy, and improved efficiency make UHF RFID readers a cost-effective solution.

　　Applications of UHF RFID Readers

　　1.Inventory Management: In retail and warehouses, UHF RFID readers streamline inventory management by enabling quick and accurate counting of stock. This leads to better stock control and reduces instances of overstocking or stockouts.

　　2.Asset Tracking: Businesses use UHF RFID readers to track valuable assets such as equipment, vehicles, and tools. This helps in reducing theft, loss, and misplacement of assets.

　　3.Supply Chain Management: UHF RFID readers enhance visibility across the supply chain, allowing for real-time tracking of goods from production to delivery. This improves transparency and efficiency in logistics.

　　4.Access Control: In security-sensitive environments, UHF RFID readers are used to control access to restricted areas. They ensure that only authorized personnel can enter specific zones.

　　5.Healthcare: Hospitals and clinics use UHF RFID readers to track medical equipment, medications, and patient information. This improves patient care and ensures the availability of critical supplies.

　　Key Features of UHF RFID Readers

　　Multiple Tag Reading: UHF RFID readers can read hundreds of tags simultaneously, making them highly efficient for large-scale operations.

　　Durability: These readers are designed to withstand harsh environments, including extreme temperatures, dust, and moisture, ensuring reliable performance in various conditions.

　　Connectivity Options: UHF RFID readers come with various connectivity options such as USB, Ethernet, and Wi-Fi, allowing seamless integration with existing systems.

　　User-Friendly Interface: Many UHF RFID readers feature intuitive interfaces that make them easy to set up and use, even for personnel with limited technical expertise.

　　Compatibility: They are compatible with a wide range of RFID tags and labels, providing flexibility in their applications.

　　Choosing the Right UHF RFID Reader

　　When selecting a UHF RFID reader, consider the following factors:

　　Read Range: Choose a reader that meets the required read range for your specific application.

　　Environment: Ensure the reader is suitable for the environmental conditions where it will be used.

　　Tag Compatibility: Verify that the reader is compatible with the types of RFID tags you are using.

　　Integration: Look for readers that can easily integrate with your existing systems and software.

　　Conclusion

　　UHF RFID readers are powerful tools that offer numerous benefits for businesses across various industries. From improving inventory management to enhancing supply chain visibility, these devices play a crucial role in modern operations. By investing in UHF RFID technology, businesses can achieve greater efficiency, accuracy, and cost savings.

　　As the core component of modern electronic equipment, the design and manufacturing technology of PCB directly determines the performance, stability and reliability of electronic products. This paper will deeply analyze the technical points of the design and manufacture of printed circuit boards to help readers better understand this process.However, with the development of the industry, pcb assembly manufacturer It will also bring us more and more consumer experiences, so that users can really feel the upgrade and change. https://intechcircuit.com/

　　I. Key points of printed circuit board design

　　circuit design

　　Circuit design is the core of PCB design, which determines the function and performance of the circuit system. In circuit design, factors such as the layout of components, the direction of wires and the transmission of signals need to be considered to ensure the stability and reliability of the circuit system. At the same time, it is necessary to consider the size, number of layers and materials of the circuit board to meet the specific needs of the product.

　　Component selection

　　The choice of components has an important influence on the performance and stability of PCB. When selecting components, it is necessary to consider their performance parameters, packaging form, reliability and other factors to ensure that components can meet the requirements of the circuit system. At the same time, it is necessary to pay attention to the compatibility and replaceability of components, so that they can be replaced conveniently in the later maintenance and upgrade.

　　Thermal design

　　According to xiaobian of PCB factory, with the continuous improvement of power density of electronic equipment, thermal design becomes more and more important. In PCB design, it is necessary to fully consider the heat dissipation of components and adopt reasonable heat dissipation structure and materials to ensure that components can operate at normal working temperature.

　　Electromagnetic compatibility (EMC) design

　　Electromagnetic compatibility refers to the ability of electronic equipment to work normally in electromagnetic environment. In PCB design, it is necessary to consider factors such as electromagnetic radiation and electromagnetic interference, and adopt appropriate technical means such as shielding and filtering to ensure that electronic equipment can work normally in complex electromagnetic environment.

　　Second, the technical points of printed circuit board manufacturing

　　Material selection

　　When selecting materials, we need to consider its electrical properties, mechanical properties, heat resistance and other factors to ensure that PCB can meet the requirements of the circuit system. At the same time, we need to pay attention to the environmental protection and sustainability of materials to meet the green development requirements of modern manufacturing industry.

　　machining precision

　　The machining accuracy of PCB directly affects the stability and reliability of the circuit system. In the process of PCB manufacturing, it is necessary to adopt high-precision processing equipment and technology to ensure that the dimensional accuracy and wire accuracy of the circuit board meet the design requirements.

　　welding technique

　　Welding is one of the key steps in PCB manufacturing. Welding quality directly affects the performance and reliability of the circuit system. In the welding process, it is necessary to adopt appropriate welding methods and parameters to ensure the good connection between components and circuit boards. At the same time, we need to pay attention to the thermal stress and mechanical stress in the welding process to avoid damage to the circuit board.

　　Detection and testing

　　After the PCB is manufactured, strict inspection and testing are needed to ensure that the quality and performance of the PCB meet the design requirements. Testing and testing contents include electrical performance testing, mechanical performance testing, environmental adaptability testing, etc. Only through strict inspection and testing can we ensure the quality and reliability of PCB. The design and manufacturing technology of printed circuit board is a complex and delicate process, which needs to consider many factors comprehensively.

　　By deeply analyzing the technical points of its design and manufacture, we can better understand this process and provide a strong guarantee for the performance, stability and reliability of electronic products.

　　Umbrellas are daily necessities for people. Everyone should have the experience of buying umbrellas. But have you really understood umbrellas when you buy them? Do you think you can choose an umbrella? Is the umbrella you choose suitable for you? Do you know what to pay attention to when choosing an umbrella? Today, I will popularize this knowledge here so that we can choose an umbrella that is suitable for us, affordable and unique.According to professional reports, straight umbrella There will be a great period of growth, and the market business is constantly expanding, and it will definitely become bigger and bigger in the future. https://topumbrella.cc/

　　umbrella quality

　　The quality of the ribs:

　　determines the quality of an umbrella. The ribs are mainly divided into fiber ribs and steel ribs. Fiber rib umbrellas are more wind-resistant and rust-proof. The number of ribs is divided into 8 ribs, 10 ribs, 16 ribs, etc. The more the better.

　　The density of the umbrella cloth:

　　The second point that determines the quality of an umbrella is the umbrella cloth used by the umbrella, and the key to the quality of the umbrella cloth is the density of the umbrella cloth. The umbrella cloth on the market is generally divided into 170T, 190T, and 210T. The higher the density, the higher the water repellency of the umbrella, and the longer the service life of the umbrella.

　　Straight-pole umbrellas are more durable:

　　Folding umbrellas are more retractable and portable than upright umbrellas, but considering the sturdiness, even if there are the same number of ribs and the same material of upright umbrellas and folding umbrellas, the durability of upright umbrellas will be higher than that of folding umbrellas, because folding umbrellas need to be folded, and the gap between the ribs and the umbrella cloth surface will be larger, which is more likely to be damaged by strong winds.

　　Turn the top of the umbrella to see the tightness:

　　Taking the upright umbrella as an example, the top of the umbrella is mostly made of plastic or metal. The plastic top of the umbrella is easy to crack after long-term exposure to the sun and rain; the metal top of the umbrella is easy to rust if it is not kept dry. When purchasing, you can use your fingers to slightly turn it. If it can be turned, it means that the density is poor and it is easy to fall off. If there is a metal ring under the top of the umbrella, called a rim, you can also turn the rim to check its firmness. Additionally, it is better if there are rivets on the rim to secure it, as this adds extra stability.

　　Turn the umbrella to test the handle:

　　Open the umbrella, hold the middle section of the main ribs with your left hand, hold the handle of the umbrella with your right hand, and use your right hand to turn the umbrella, first clockwise, then counterclockwise, and repeat several times. In this way, you can know whether the handle and the ribs are firm.

　　Folding and pulling trial:

　　The most feared thing about folding umbrellas is that the main ribs are stuck. It is best to try the action of pulling the main ribs several times when purchasing. If it feels smooth when pulling, the quality of the umbrella is good. If it feels stuck, don¨t buy it.