flange moment under operating condition

例句：

1. 1.The car's door has a flange that can be used to open it.
   这辆车的门有一个凸缘，可以用来打开它。
2. 2.The boat's stern has a flange that keeps it from sinking.
   船的尾部有一个凸缘，可以防止它沉没。
3. 3.The machine had a flange that could be adjusted to fit different parts.
   这台机器有一个可以调整以适应不同部件的凸缘。