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齿轮传动是机械传动中应用最广的一种传动形式。它的传动比准确，效率高，结构紧凑，工作可靠，寿命长。

目前齿轮技术可达到的指标：圆周速度v=300m/s，转速n=105r/min，传递的功率P=105kW，模数m=0.004~100mm，直径d=1mm~152.3mm。

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