Auto Part switch parts, stamping with auto welding and auto riveting or auto assembly. Auto Part 1: material: Copper, Brass, Bronze, CuSn, CuNi, Ni, CuNiZn, Monel, ... machine: 0.5-80tons, Germany and Japan Auto welding system, Japan auto stamping and riveting assembly system.6: Surface finishes: Nickel/silver/gold plating ...