齿轮成对运转，无滑动地传递并改变旋转运动和转矩，一个齿轮的齿与配对齿轮的齿啮合。
Gears operate in pairs, the teeth of one engaging the teeth of a second, to transmit and modify rotary motion and torque.
齿轮成对运转，无滑动地传递并改变旋转运动和转矩，一个齿轮的齿与配对齿轮的齿啮合。
Gears operate in pairs, the teeth of one engaging the teeth of a second, to transmit and modify rotary motion and torque.
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