Fasteners are a kind of mechanical parts that are used for fastening joints and are widely used. In all kinds of machinery,
Equipment, vehicles, ships, railways, bridges, construction, structures, tools, instruments, meters and supplies
Wait below, you can see all kinds of fasteners. It is characterized by single type and specification and function.
There are different uses, and the degree of standardization, serialization and generalization is also extremely high. Therefore, some people have...