... of watch case, watch flan, handle, mold accessory, kitchen and table ware, art ware, standard part, fastener, fabricated mechanical part, bronze ... , zinc as well as various noble metals.B. Heat Treatment (surface quench):It is mainly aims to change the rigidity of ... pin, chain wheel, aluminum wheel, valve, rock arm shaft, semi drive shaft, small shaft and fork.3. Various electric tools, such as gear ...