The paper discusses also how to master rapidly its charting and chart reading based on the first Angle projection.
阐述了在学会第一角投影法的基础上，如何迅速地掌握第三角投影的画图和看图方法。
2
With respect to the third angle projection, this paper sets forth briefly its rationale, characteristics, and chart reading, in the form of comparison.
本文用对比形式扼要地阐述了第三角投影法的基本原理、特点和看图方法。
3
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.