The second part is about the research of same basic theoretical principles of equivalence.
第二部分，研究等同原则的基础理论。
The research of reality principles of machine movement.
发动机机械系统真实运动规律研究。
The related research, design principles, user and task analysis, system design model are presented.
介绍了相关研究背景、设计原则、用户与任务分析以及系统设计模型。
The related research, design principles, user and task analysis, system design model are presented.
介绍了相关研究背景、设计原则、用户与任务分析以及系统设计模型。
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