external gear

• 外接齿轮,外齿轮

external gear的用法和样例：

例句

1. 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。