Processing material: steel, aluminum, copper, alloy, ceramics, glass, powder metallurgy, gray iron, cast iron, stainless steel, and other materials. Processing parts: oil pump, oil nozzle, connecting rod, cylinder block, cylinder liner, fork, aerospace, automobile, motorcycle, mold, industrial sewing machine, air conditioning refrigeration, hydraulic pneumatic, oil pump nozzle, bearing, construction machinery, and etc. Structure of part holes: through-hole, blind hole, key –slot hole, step hole, and series hole.