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论述了基于特征的产品建模的两个关键技术,即基于约束的特征描述和非流形几何模型数据结构,给出了基于特征的产品建模系统的扩充框架
Two key technologies of feature-based product modeling are discussed, that is, constraint-based feature description and non-manifold geometric model data structure, and an extended framework of feature-based product modeling system