front cross rail

例句：

1. 1.The train's front cross rail is damaged.
   火车的前交叉轨道受损了。
2. 2. The engineer inspected the front cross rail before starting the engine.
   工程师在启动引擎前检查了前交叉轨道。
3. 3.The construction crew had to replace the front cross rail due to corrosion.
   施工队不得不因为腐蚀而更换前交叉轨道。