rail lubricator

例句：

1. 1. The train's rail lubricator was damaged during the accident.
   火车的轨道润滑器在事故中受损了。
2. 2. The engineer used a special toolto remove the debris from the rail lubricator.
   工程师使用特殊工具从轨道润滑器中清除了碎片。
3. 3. Thenew rail lubricator is designedto improve the efficiency of the train's operation.
   新型轨道润滑器旨在提高火车运行的效率。