Factory Customized Powder Metallurgy Sintered Engine Sprocket Wheel Chain Motorcycle Sprocket Wenling Zuhui Import and Export Co., Ltd Base Info Description Pre：Customized 20crmnti Large Size Inner Spur Gear /Industrial Cylindrical Transmission Gear Wheel Next：Elevator Automatic Sliding Gate Helical Straight Pinion M3 M5 M8 Wheel and Gear Rack
