... mechine make it. Extrusion new mechine:"Bihler" Automatic Stamping Metal 1: stamping parts material: Copper, Brass, Bronze, CuSn ... , computer electronics. 3: Process: punching, riveting, welding, metal processing 4: Applied software for specification drawings: Auto CAD, ... finishes: Nickel/silver/gold plating. Polishing 7: Products range: wall switch, relay, breaker, thermostat, mid/low voltage switch ...