单词：external gear
external gear的用法和样例：
例句
- A kind of new typed epicyclic gear transmission with few teeth differenced inner plane motion of spur gear and possessing practical value was put forward in this study.提出了一种具有实用价值的外齿轮内平动式的新型少齿差行星传动。
单词：external gear 相关文章
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