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本公司行星齿轮及太阳齿齿轮材料采用SCM4材料，经硬滚，渗碳，热处理至硬度50~55HRC及齿面研磨加工，确保齿轮精度，最佳耐磨耗，耐冲击韧性，使寿命更长。
Jin Chang Co., Ltd. planetary gear and the sun gear is made of SCM4 material, the hard roll, carburizing, heat treatment to the hardness of 50~55HRC and tooth surface grinding, ensure the precision of gear, the best wear resistance, impact resistance and toughness, which gives a longer life.
Jin Chang Co., Ltd. planetary gear and the sun gear is made of SCM4 material, the hard roll, carburizing, heat treatment to the hardness of 50~55HRC and tooth surface grinding, ensure the precision of gear, the best wear resistance, impact resistance and toughness, which gives a longer life.
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