... switch parts, stamping with auto welding and auto riveting or auto assembly. stamping parts and electrical contacts:1: stamping parts material: ... , Ni, CuNiZn, Monel, rivet material: solid silver alloy contacts and bimetal contacts, welding material: Ag, AgNi, AgCuNi, AgSnO22: OEM ... machine: 0.5-80tons, Germany and Japan Auto welding system, Japan auto stamping and riveting assembly system. 6: Surface ...