slewing gear

例句：

1. 1. The car's steering wheel is connected to the slewing gear.
   汽车的方向盘与转向齿轮相连。
2. 2.The engineer used a special tool to remove the slewing gear.
   工程师使用特殊工具来移除转向齿轮。
3. 3.The slewing gear was designed to make the car turn smoothly.
   转向齿轮的设计是为了使汽车平稳转弯。