三面投影图(或者说主视图、俯视图及其左视图)所图示的空间形体一般可以完全确定的。
The space configuration illustrated in v? H? W three-plane projection drawing (i. e. front view, top view and left view) can generally be determined completely.
论述三维立体图生成三面投影图的方法，解决在绘制投影图中的困难。
The method of three-planes projection graph created by 3D spatial graph is discussed. It solve the difficult in drawing projection graph.
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