pivot beam lock

例句：

1. 1. The car'spivot beam lock is broken, so wecan't turn it around.
   汽车的枢轴梁锁坏了，所以我们不能转动它。
2. 2. The engineerused a special tool to removethe pivot beam lock.
   工程师使用一种特殊的工具来移除枢轴梁锁。
3. 3. Thepivot beam lock was designed to preventthe car from rolling backwards.
   枢轴梁锁的设计是为了防止汽车向后滚动。