... the help of punch press, forging machine or other equipments for instances, hot extrusion of watch case, watch flan, handle ... on the principle of hot expansion or hot smelting, for instances, embedded welding of copper core of computer radiator ... as pliers, wrench, hammer, ax, screwing tools and shear (orchard shear).Quench for various automobile and motorcycle fittings, such as crankshaft, connection ...