该ＣＡＤ子系统中，采用图形菜单描述零件的结构形状；提出了一种新的零件几何建模方法－ＧＴ素元法，组合ＧＴ素元形成零件的计算机几何模型；应用隐码（内部码）使设计的零件合理化和标准化。

The paper mainly covers the research work of the CAD subsystem. In this subsystem, the menus with icons are used to describe the construction shape, and 2D primitives are pieced together to compose the part to be designed. By using the internal code and building the internal code file to store optimal part constructions, the standardization and rationalization for part design could be achieved.

TH132.417