介绍回头曲线采用圆曲线时，其半径以任意值和指定值的测量放样，以达到灵活应用的目的。
This paper introduces the measuring sample layout of the back curve, when the back curve is round, the radius can be any value or given value for realizing its flexibility of application.
介绍回头曲线采用圆曲线时，其半径以任意值和指定值的测量放样，以达到灵活应用的目的。
This paper introduces the measuring sample layout of the back curve, when the back curve is round, the radius can be any value or given value for realizing its flexibility of application.
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