脱轨器

例句：

1. 1.The train's derailed on the track.
   火车在轨道上出轨了。
2. 2.The engineer used a track disconnector to fix the problem.
   工程师使用一个脱轨器来解决这个问题。
3. 3. The train was pulled back onto the track by the track disconnector.
   火车被脱轨器拉回轨道上。