cross rail elevating mechanism

例句：

1. 1.The cross rail elevating mechanism is crucial for the safety of the train operation.
   交叉轨道提升机制对于火车运行的安全性至关重要。
2. 2.The engineer carefully inspected the cross rail elevating mechanism before starting the engine.
   工程师在启动引擎前仔细检查了交叉轨道提升机制。
3. 3. The cross rail elevating mechanism ensures that the train can smoothly transition from one track to another.
   交叉轨道提升机制确保列车能够平稳地从一个轨道转移到另一个轨道。