A simple and convenient method of drawing indicates oblique plane, direction of projection, is given in this paper, making it more simple and direct as well as speedy to chart.
给出了双斜平面的一种简便的图示方法——“斜投影法”，使作图更加简捷、迅速。
A simple and convenient method of drawing indicates oblique plane, direction of projection, is given in this paper, making it more simple and direct as well as speedy to chart.
给出了双斜平面的一种简便的图示方法——“斜投影法”，使作图更加简捷、迅速。
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