rail bearing

例句：

1. 1.The train's wheels are securely bolted to the rails for safety.
   火车的轮子被安全地螺栓固定在轨道上。
2. 2. The engineer carefully adjusted the rail bearings to ensure smooth operation.
   工程师仔细调整了钢轨支撑，以确保运行平稳。
3. 3. The railway was damaged during a recent storm, requiring the replacement of several rail bearings.
   最近一场暴风雨损坏了铁路，需要更换几组钢轨支撑。