Software requirement modeling and use case technology are hot points of research to the software engineering. Use case is the key technology for organic requirement in UML.
需求建模和用例技术是软件需求工程研究的热点，用例是UML中组织需求的重要技术。
According to the analysis for the feature and requirement of testing fixture design, the general designing and modeling methods of testing fixture based on conventional CAD software is presented.
在分析了检具设计的特点和要求的基础上，提出了在通用CAD软件平台上进行检具设计建模的一般方法。
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