... made by Cold Pressure Welding Machine, Main products include:Bi-metal Electrical Contacts: AG/Cu, FAG/Cu, AgNi/Cu, ... amount more 200 sets for making Contact Rivet include Tri-metal rivet machine from Germany, Bi-compoundedrivet machine, Colored Microscope, ... pieces annually. Rivet, Silver Rivet, Bimetal Rivet, Tri-Metal Rivet, Solid Rivet, Moving Rivet, Contact Rivet, Relay Point, Relay Connector, ...