Sprocket manufacturer / supplier in China, offering 45# Fine Sprocket Teeth Can Be Processed by High Frequency Inner Hole Finishing and Surface Black Injection Treatment, 20 Manganese Titanium Material Precision Forged Gear, Overall Carburized Surface Black Injection Treatment, Hardness Between 55 Degrees, Precision Forging, Precision Sprocket, High-Frequency Treatment of Teeth, Black Injection on The Surface, and Precise Internal Space to Zero Thread and so on.
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