Based on the concept of virtual enterprise, it is necessary to develop a proper product definition model for collaborative product development system in distributed environment.

基于虚拟企业的思想，分布式环境下的协同产品开发系统迫切需要有一个合理的产品定义模型。

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The functions of system and some related key technologies, such as distributed CAE data management, model base system, collaborative assistant tools were discussed in detail.

详细介绍了该系统的功能和关键技术的实现，包括分布式CAE数据管理、基于文件的模型库系统、协同辅助工具等技术。

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By an investigation to the system design on sheet metal unfolding, the running mode of ASP and the relative theory of distributed collaborative design are studied.

以钣金展开设计系统为研究对象，研究了ASP的运行模式和分布式协同设计的相关理论。

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