耐磨耐酸碱齿轮 3M*13T,4M*13T,3M*17T 4M*13T:外径59.5,内孔9.7,齿长13,总长30mm,台阶外径20mm 3M*13T:外径45,内孔9.7,齿长12,总长30mm,台阶外径20mm 3M*17T:外径56,内孔9.7,齿长12,总长30mm,台阶外径25mm
耐磨耐酸碱齿轮 3M*13T,4M*13T,3M*17T 4M*13T:外径59.5,内孔9.7,齿长13,总长30mm,台阶外径20mm 3M*13T:外径45,内孔9.7,齿长12,总长30mm,台阶外径20mm 3M*17T:外径56,内孔9.7,齿长12,总长30mm,台阶外径25mm
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