top-contact rail

例句：

1. 1.The top-contact rail is crucial for the safe operation of the train.
   顶接轨道对于火车的安全运行至关重要。
2. 2. The engineer carefully inspected the top-contact rail before starting the engine.
   工程师在启动引擎前仔细检查了顶接轨道。
3. 3. The top-contact rail was damaged during the recent storm, which caused delays in the transportation process.
   最近一场暴风雨损坏了顶接轨道，导致运输过程延误。