Gear a, at the end of the drive shaft, and gear B, on the countershaft, are in constant mesh.

齿轮A位于驱动轴的末端，齿轮b在副传动轴上，它们恒定啮合。

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Gear a, at the end of the drive shaft, and gear B, on the countershaft, are in constant mesh.

齿轮A位于驱动轴的末端，齿轮b在副传动轴上，它们恒定啮合。

youdao