Metal zippers are divided into copper zippers and aluminum zippers according to their materials. Copper zippers are divided into 85 copper and 65 copper; According to the type of microphone teeth, it is divided into ordinary teeth, Y-shaped teeth, corn…
The zipper is composed of rows of chain teeth arranged in an orderly manner. The pull ring moves up and down to achieve the purpose of merging and separating. It is widely used in life. It often appears in clothing,…
In people’s daily life, clothes are things that must be worn every day, and students’ schoolbags must be carried every day. Both clothing and schoolbags basically have a zipper design. The zipper not only helps the clothes fit the schoolbag…