The tolerancing process and its characteristics were studied based on the product conceptual structure design automation technology. A four layer product tolerance model was put forward.
在产品概念结构设计自动化技术基础上，研究了产品公差设计过程及其特点，提出了四层产品公差结构模型。
The computer aided design of building structure takes conceptual design as basis. It is a process of calculation, analysis and graph manipulation by computer.
建筑结构计算机辅助设计是以概念设计为基础，运用计算机进行计算、分析和图形处理的过程。
Aiming at difficult sorting and retrieving complicated structure parts in part lib, a method for part design by using conceptual part structure qualitative models is presented.
针对零件库中复杂结构零件难以分类和检索问题，提出一种基于概念零件结构定性模型的零件设计可重用方法。
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