斜投影是投影方向倾斜于投影面的一种平行投影。

An oblique projection is a sort of parallel one inclining to the projection plane.

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.