The steering system  is one of those having the most significant influence on vehicle performance and reliability.对汽车性能及可靠最有影响的系统之一就是转向系统。

Steering system including steering wheel,steering gears,linkages,and other components is used to control the direction of a vehicle’s motion.转向系统包括方向盘，转向器，转向中间轴还有其它部分一起控制汽车的行驶方向。

There are a couple of different types of steering gears.有几个不同类型的方向机。

The most common ones are rack-and-pinion and recirculating-ball steering gears.最普遍的方向机就是齿轮齿条式往复循环球方向机。

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