steering box cover

例句：

1. 1. The car's steering box cover is damaged,so we need to replace it.
   汽车的转向控制箱盖损坏了，我们需要更换它。
2. 2. The mechanic replaced the steering box coverwith a new one.
   机械师用一个新的替换了转向控制箱盖。
3. 3. The driver carefullyinspected the steering box cover before startingthe engine.
   司机在启动发动机前仔细检查了转向控制箱盖。