... machining Material: carbon steelprocess: thread machining by cncthe precision metal parts are for oil-fieldheat treatment can be done as ... can be done as per buyer's drawingsWe specialize in metal casting of aluminum, bronze, copper, iron, steel and ... , Brass, Carbon steel, Stainless steel, Alloy metal & etc. Equipment:CNC lathe, processing center, miller, grinder, punching machine & etc. Tel:0086-411 ...