Reucer, Gearbox, Screw Jack manufacturer / supplier in China, offering Jzq500 Duty Industrial Shearing Helical Gearbox for Crushing Construction Mixing, Jzq500 9 Ratios Selectable Helical Gear Speed Reducer 12.16-31.50 Helical Cylindrical Type, Factory Direct Jzq500 Shaft Helical Gear Reducer 40.17: 1 Ratio Double Stage Assembly and so on.