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.

youdao

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.

youdao