... on-time delivery Strict inspection according to drawings ISO9001:2000 OEM/ODM Valve fittingsSand casting and machiningMaterial: cast ... deliveryWeifang Rainbow Machinery Company is a professional manufacturer of precision casting and CNC machining.Products: Precision casting ... , train parts, auto parts, marine hardware, all kinds of gears, gear boxes, impellers, pumps, valves, flanges, joints ...