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汽车在运行过程中,调头是不可缺少的基本作业,相比较而言,公路调头是难度最大、使用范围最广的一种调头形式,它适用于不能一次顺车调头的比较狭窄的地段上。交警部门也曾经把两轴距加20厘米为宽度的划线公路调头作为考核驾驶员的一项重
In the process of running the car, the U-turn is an indispensable basic operation. In contrast, U-turn is the most difficult and most widely used U-turn style. It is suitable for a relatively narrow area that can not turn around smoothly. Traffic police department also once the two-wheelbase plus 20 cm width of the crossed highway as a test driver’s weight