Principle views and directional views
基本视图及向视图请点击鼠标左键显示后面内容 If the views are not placed following the requirement of orthographic projection, view name “×” must be signed above the view, an arrow is used to show the projective direction in corresponding views, and the same letter must be signed. Such view is called directional view.
图名称,在相应视图附近用箭头指明投射方向,并注上同样的字母,该视图称为向视图。Example 1. Draw all projection views in first and third angle.
画出物体的第一、三角基本视图。Example 2. Draw four views in third angle projection.