According to the integration requirement of design and manufacturing, this paper discusses the existent problems of geometric modelling, in present CAD systems and the necessity of product modelling.
根据对产品设计与制造集成化的要求，分析了现有CAD系统中几何建模存在的问题及阐述了产品建模的必要性。
According to the integration requirement of design and manufacturing, this paper discusses the existent problems of geometric modelling, in present CAD systems and the necessity of product modelling.
根据对产品设计与制造集成化的要求，分析了现有CAD系统中几何建模存在的问题及阐述了产品建模的必要性。
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