Auto Part switch parts, stamping with auto welding and auto riveting or auto assembly. Auto Part 1: material: Copper, Brass, Bronze, CuSn, CuNi, ... , AgSnO22: OEM/ODM parts of Pressing Parts: Yes, Auto parts, engine parts, computer electronics.3: Process: punching, ... , Acrobat5: Precision punch machine: 0.5-80tons, Germany and Japan Auto welding system, Japan auto stamping and riveting assembly system ...