As this kind of structure system is a self-equilibrium system, it is necessary to make it clear of the distribution of self-equilibrium stress.
由于此类结构体系是一种自平衡体系，在分析其力学性能之前必须先知道其自应力分布。
As this kind of structure system is a self-equilibrium system, it is necessary to make it clear of the distribution of self-equilibrium stress.
由于此类结构体系是一种自平衡体系，在分析其力学性能之前必须先知道其自应力分布。
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