draw-off gear

例句：

1. 1.The draw-off gear is designed to efficiently remove oil from the well.
   抽油机齿轮设计用来从井中高效地抽油。
2. 2. The pumping gear was damaged during the maintenance process.
   在维护过程中，泵送齿轮受损了。
3. 3.The engineers had to replace the old draw-off gear with a new one.
   工程师们不得不用一个新的抽油机齿轮来替换旧的。