Pick material The lock materials on the market can be basically divided into stainless steel, copper, zinc alloy, iron steel and aluminum. Stainless steel has good strength, strong corrosion resistance and constant color. It is the best lock material; copper is more versatile, mechanical properties are superior, and the price is also expensive; high-quality zinc alloy is strong and wear-resistant, and its corrosion resistance is very strong and easy. Forming, generally used to make mid-range locks. Look at the surface Generally speaking, the surface treatment of the lock has three kinds of electroplating, spraying and coloring. These surface treatments can form a protective film on the product, which can prevent corrosion and rust, and make the product more beautiful and durable. Good quality locks are generally electroplated, with a moderate coating, very uniform coating, bright colors, no signs of air bubbles, rust and oxidation. 掂weight When choosing a lock, don't neglect the weight, feel, and listen to the sound. The products that cut corners are made of hollow materials and inferior materials. Such materials are very light and have a bad hand feeling, and the sound is very stuffy; good locks are the opposite. Wireless Ultrasonic Water Meter Here you can find the related products in Wireless Ultrasonic Water Meter, we are professional manufacturer of Wireless Ultrasonic Water meter,Ultrasonic Smart Water Meter,Ultrasonic Water Flow Sensor,Portable Ultrasonic Flow Meter For Water. We focused on international export product development, production and sales. We have improved quality control processes of Wireless Ultrasonic Water Meter to ensure each export qualified product. Wireless Ultrasonic Water Meter,Ultrasonic Smart Water Meter,Ultrasonic Water Flow Sensor,Portable Ultrasonic Flow Meter For Water Xi'an Gavin Electronic Technology Co., Ltd , https://www.gaimcmeas.com
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How to choose the quality of locks and locks