In this paper, inertia reference frame and un-inertia reference frame were studied and questions about mechanical work and conservation of energy in different inertia reference frame were discussed.
本文讨论了惯性参照系与非惯性参照系，分析了在不同的惯性参照系中做功和机械能守恒问题。
The inertia of the frame was reduced without reducing of rigidity, and this method has provided important reference of optimum structure design of simulation table frame.
在保证一定刚度的条件下进一步降低了框架的转动惯量，为框架结构优化设计提供了重要参考。
The inertia of the frame was reduced without reducing of rigidity, and this method has provided important reference of optimum structure design of simulation table frame.
在保证一定刚度的条件下进一步降低了框架的转动惯量，为框架结构优化设计提供了重要参考。
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