suspension rail

例句：

1. 1.The suspension rail is designed to support the weight of the train.
   悬挂轨道设计用来支撑火车的重量。
2. 2. The suspension rail was installed to improve the safety of the bridge.
   悬挂轨道的安装是为了提高桥梁的安全性。
3. 3.The suspension rail is essential for maintaining the stability of the bridge.
   悬挂轨道对于保持桥梁的稳定性至关重要。