steering gear case

例句：

1. 1. The car's steering gear case is damaged, which affects the driving experience.
   汽车的转向齿轮箱损坏了，这影响了驾驶体验。
2. 2. The mechanic replaced the steering gear case with a new one.
   技师用一个新的转向齿轮箱替换了旧的。
3. 3. The driver had to change the steering gear case due to the heavy rain.
   由于大雨，驾驶员不得不更换转向齿轮箱。