摘要
针对三维画法几何中的换面法进行了较深入的研究。
In this papaer,profound research is made in the way of change projection plane of three-dimensional projection geometry.The problem,which has not been solved,on the most times of change projection plane is dissected.
关键词
当量几何元素
当量约束
有效换面
画法几何
suitable gecmetry element
proper restraint
the simplest divide
effection change projection plane
