现代CAD中，系统在满足图样标准化的同时难以保证图样和设计信息的相关性，为此，文中提出了信息主模型的概念。
In modern CAD system, it is difficult to satisfy the standard requirements of drawing and at the same time to keep relativity between the information of the design and the drawing.
现代CAD中，系统在满足图样标准化的同时难以保证图样和设计信息的相关性，为此，文中提出了信息主模型的概念。
In modern CAD system, it is difficult to satisfy the standard requirements of drawing and at the same time to keep relativity between the information of the design and the drawing.
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