... : carbon steelprocess: thread machining by cncthe precision metal parts are for oil-fieldheat treatment can be done as per ... be done as per buyer's requirements, for example, heat treatment, painting, etc.For quotation, please send sketches, prints or ... Brass, Carbon steel, Stainless steel, Alloy metal & etc. Equipment:CNC lathe, processing center, miller, grinder, punching machine & etc. Tel:0086-411 ...