... welding and auto riveting or auto assembly. stamping parts and electrical contacts:1: stamping parts material: Copper, Brass, Bronze, CuSn, ... : OEM/ODM parts of Pressing Parts: Yes, Auto parts, engine parts, computer electronics. 3: Process: punching, riveting, welding, metal processing 4: ... Germany and Japan Auto welding system, Japan auto stamping and riveting assembly system. 6: Surface finishes: ...