Road surface model is basis of highway three dimension design, the key is the overlaid compute of design model and terrain model.
公路三维表面模型是公路三维设计的基础，其关键是设计模型和地表模型的叠加运算。
This sort of impassible terrain has no grid overlaid on it.
这类不觉疼痛的地形没有在它上涂上的闸极栏。
This sort of impassible terrain has no grid overlaid on it.
这类不觉疼痛的地形没有在它上涂上的闸极栏。
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