1.apply to large rig equipments 2.supply parts for national oil varco for more than 3 years. 3.OEM available. 1.Material ... 2.Processing: welding,stamping,punching,blending,machining ,milling,forging,casting and so on.3. high quality, quick delivery, competitive ... :2000.Processing: stamping, punching, blending,machining ,milling,forging,casting and so onOur business line is involved in pig machine ...