According to mechanism of orthographic projection, this paper has set up the converted relation between screen coordinate and space coordinate.
根据正投影的机理，建立了点线面屏幕坐标与空间关系的转换关系。
There are six orthographic views. Please imagine the different posture of triangular prism in space.
下面有六个三视图，请你想象一下各三视图中三棱柱在空间的姿态。
By means of the multiple-planes orthographic projection of multidimensional space, both the graphic method and graphics of the mixture problems have been given.
用多维空间的多面正投影方式，给出物料混合问题的图示、图解计算方法。
By means of the multiple-planes orthographic projection of multidimensional space, both the graphic method and graphics of the mixture problems have been given.
用多维空间的多面正投影方式，给出物料混合问题的图示、图解计算方法。
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