The method and technology of virtual 3d assembly are discussed, and the method of the valve assembly CAD design and emulation concept-oriented design is pointed out in the paper.
探讨了面向概念设计的产品虚拟三维装配建模过程和三维建模方法，提出了面向概念设计阀门装配CAD设计与仿真的思想和方法。
Structure and realization of CAD system for the orbit-style sphere valve were described.
本文描述了轨道式球阀CAD系统的结构与实现。
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