A path data structure is given to calculate the viewpoint along railway with cross.
并给出了适合于沿铁路轨道进行视点计算的数据结构。
The track structure of express railway requires high smoothness.
高速铁路的轨道结构要求具有高平顺性。
Therefore, the joint transportation of railway and water way is matured in transport structure.
在运输结构上，通过汉江建立水铁联运的条件已经成熟。
Therefore, the joint transportation of railway and water way is matured in transport structure.
在运输结构上，通过汉江建立水铁联运的条件已经成熟。
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