齿轮在齿厚部位都是单侧磨损，所以可将齿轮翻转180度使用。

Gear tooth thickness at the site are unilateral wear, so gear can be rotated 180 degrees to use.

youdao

齿轮在齿厚部位都是单侧磨损，所以可将齿轮翻转180度使用。

Gear tooth thickness at the site are unilateral wear, so gear can be rotated 180 degrees to use.

youdao