1. In normal use, pay attention to whether the zipper has "broken belly", "out of teeth", crookedness and other defects. If thes...
The general styles of zippers are as follows 1. Closed fasteners) The lower stop tooth fixing nail, the upper stop tooth is fixed by two stop t...
The classification of zippers can be divided into the following types according to the material 1. Nylon zipper (the teeth are Tetoron teet...
2021-12-27
