... press with the help of punch press, forging machine or other equipments, for instances, hot extrusion of ... wheel, aluminum wheel, valve, rock arm shaft, semi drive shaft, small shaft and fork.3. Various electric tools ... such as gear and axes.4. Quench for machine tools, such as lathe deck and guide rail. ... well as copper and copper.3. Compound pot bottom welding is mainly applicable to the braze welding ...