Gear, Spur Gear, Gear Shaft manufacturer / supplier in China, offering Huirong High Precion Customized Gear Ring Huge Diameter Gear Pinion Internal External Teeth Gear, Gear Ring Steel OEM Customized High Speed Gear Rings Reducer Motor Parts Optional Ring Gear, Manufacturer Aluminum Alloy Htd2m 3m 5m 40t Timing Pulley and so on.