Lofting flat road to automatic calculation of factors, including the line segment / circle curve paragraph / paragraphs, such as curve for the field to provide a convenient construction.
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- 详细说明： 道路放样要素计算.；能够对道路平面放样要素进行自动计算；包括直线段/圆曲线段/缓和曲线段等；为外业施工提供了方便
