rail anchors

例句：

1. 1. The train's wheels are securely fastened to the rails.
   火车的轮子被牢固地固定在铁轨上。
2. 2. The engineer inspected the rail anchors before starting the journey.
   工程师在开始旅程前检查了铁轨锚固装置。
3. 3. The railway company is responsible for maintaining the safety of its rail systems.
   铁路公司负责维护其铁路系统的安全性。