The feature, structure and function of a automatic design system ZZDGS for free forging technique are introduced and treatment of some key problems in systematic development is demonstrated.
介绍了锤上自由锻工艺自动设计系统ZZ DGS的特点、结构及功能，并重点说明了系统开发中几个关键问题的处理方法。
In the end, COM technique is introduced. The development strategy, development platform, system function and system structure of power quality analysis software are presented.
最后，介绍了COM技术，提出了电能质量分析软件的开发策略、开发平台以及系统功能和系统结构。
This article expounded the development, systematical structure and core technique of the thermophysical experiment teaching system based on VRML.
阐述了基于VRML的工程热物理虚拟实验教学系统的开发方法、系统结构及关键技术。
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