... the help of punch press, forging machine or other equipments, for instances, hot extrusion of watch case, watch flan, handle, ... work pieces. Detail applications are stated as follows: 1. Quench for various hardware and tools, such as plier, wrench, hammer, ... , screwing tools and shear (orchard shear).2.Quench for various automobile and motorcycle fittings, such as crankshaft, connecting rod, piston pin, ...