undercarriage造句

There was a whine of hydraulics as the undercarriage locked into position.
随着液压系统嘎吱一声响，起落架进入了锁定位置。

The undercarriage on light aircraft does not always retract in flight.
轻型飞机飞行时起落架不一定缩回.

A kind of cutter undercarriage mechanism used in cutting machine is introduced.
介绍一种在卷筒放卷和收卷的切割分切机器中的进刀与退刀机构.