Powder Metallurgy, Oil Pump Rotor, Gear manufacturer / supplier in China, offering Sand Casting Gray Steel Cap Vacuum Pump/Water Pump/Made in China/Pump Parts/Auto Parts, Custom Sand Casting Pump for Chemical Industry, Low Noise 6300 Bearing Zz 2RS Deep Groove Ball Bearing 6300zz Bearing High Quality 6000 6200 6300 6400 Series and so on.