The hierarchy and design method for software frame is studied and the role and Function of each hierarchy is described.
研究了仿真软件框架的设计方法和结构层次的关系，并对各个层次功能要求进行了介绍。
The class hierarchy of the design standard are described and the usage method is illustrated by some examples.
文中描述了规范库类等级关系的设计并结合示例说明了规范库的使用方法。
Based on packaging carton CAD software, this paper gives a hierarchy model on component design of carton, method to realize component design, and an example of making up cartons to explain them.
基于包装纸盒CAD软件，给出了纸盒组件设计的层次结构模型和实现组件设计的方法，并以盒形拼大版为例加以说明。
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