steel coach screw

例句：

1. 1. The engineers used steel coach screws to reinforce the roof.
   工程师们使用钢制客车螺丝加固了屋顶。
2. 2. The carpenter replaced the steel coach screws with new ones.
   木匠用新的钢制客车螺丝替换了旧的。
3. 3. The train was equipped with steel coach screws for better safety.
   火车装备了钢制客车螺丝以提高安全性。