... , standard part, fastener, fabricated mechanical part, bronze lock, rivet, steel pin and pin.2. Hot fitting refers to the connection ... valve, rock arm shaft, semi drive shaft, small shaft and fork.3. Various electric tools, such as gear and axes.4 ... decoration fitting, precision mold fitting, hardware handle, eggbeater, alloy steel and steel, steel and copper as well as copper and copper.3. Compound ...