多元化的3D CAD系统是大部分制造企业所面临的现实。
What is my conclusion? Multiple 3D CAD is the reality of the majority of manufacturing organizations.
在现实的制造系统中，企业对制造资源的掌握和运用是不均衡的，是有差异的。
In real life manufacturing system, ownership and utilization of the manufacturing resources are unevenly distributed among the enterprises.
虚拟制造系统是在虚拟现实环境下的现实制造系统的映射。
The virtual manufacturing system is a mapping of a reality manufacturing system under a virtual reality environment.
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