... fastener, fabricated mechanical part, bronze lock, rivet, steel pin and pin.2.Hot fitting refers to the connection of different metals ... automobile and motorcycle fittings, such as crankshaft, connection rod, pinton pin, chain wheel, aluminum wheel, valve, rock arm shaft, small ... size mold, mold accessory and inner hole of mold Welding (brazes welding, silver soldering and brazing) It’s mainly aims to ...