在深入分析产品虚拟制造全过程的基础上，提出了基于产品定义单元(pdu)的虚拟产品模型框架。
After analyzing the whole processes of Virtual Manufacturing (VM), a new model framework for mechanical products is proposed, which is based on product definition unit (PDU).
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。
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。
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.
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