... steel, aluminum, zinc, brass, plastic etc.Making process: Stamping, deep drawing, bending, punching, threading, welding , tapping, riveting, grindingSurface treatment: ... s spare parts and all products need to technique such as welding, stamping, bending, coating, injection molding is ... renown domestic enteprise and also abroad famous enteprise such as Benz,AG,Germany, quality is stable and reliable, ...