steam locomotive side rod

例句：

1. 1.The steam locomotive was the first to cross the Great Wall of China.
   蒸汽机车是第一个穿越中国长城的。
2. 2.The engineer carefully adjusted the steam locomotive's side rods.
   工程师小心翼翼地调整了蒸汽机车的侧架。
3. 3.The steam locomotive's side rods were rusted and needed to be replaced.
   蒸汽机车的侧架生锈了，需要更换。