The arm of this principle is to solve the problem of the oblique line in the drawing so to understand and gain a more complete idea of the whole drawing and to help to read and draw it, especially when confronted with a more complex drawing even one that has been cut out for many tim.
提出了一种利用类似形互补原理,判断两个不同投影面的垂直面是否相交以及它们的交线部分的看图新方法,目的在于解决视图中的斜线问题,便于理解和把握形体的整体形状,便于看图和画图。