This paper provides an access control mechanism within collaborative CAD, based on a technique we call role-based viewing.
提出了协同CAD中信息存取的机制，这种机制是以基于角色的视图技术为基础的。
The operational intention pledge of collaborative CAD system is a complicated and crucial issue, its study possesses a challenging character.
协同CAD系统中的操作意愿保证是一个复杂而又关键的问题，其研究具有挑战性。
The operational intention pledge of collaborative CAD system is a complicated and crucial issue, its study possesses a challenging character.
协同CAD系统中的操作意愿保证是一个复杂而又关键的问题，其研究具有挑战性。
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