pipe mould:steel tube, plum tube, flat tube, oval tube, fan-shaped tube, polygonal tube, single and double groove ... mould: steel tube, plum tube, flat tube, oval tube, fan-shaped tube, polygonal tube, single and double groove pipe, tube frame, special- ... quality tool steel Cr12mov as raw materials, mouild steel Cr12mov material set high wear resistance, toughness, resistance to high pressure, high ...