... through forging press with the help of punch press, forging machine or other equipments, for instances, hot extrusion of watch case ... steel, copper, aluminum, zinc as well as various noble metals.B. Heat Treatment (surface quench):It is mainly aims to change ... blade, hard alloy cutter, milling cutter, reamer, planning tool and solid center bit. 2. Welding of various hardware mechanical gadget: Silver ...