This paper divides the equilibrium state of unstable system into two state: one is geometrical stable equilibrium state, the other is elastic stable equilibrium state.
本文将其受力状态分解为两部分，一是几何稳定平衡状态，二是弹性稳定平衡状态。
This paper divides the equilibrium state of unstable system into two state: one is geometrical stable equilibrium state, the other is elastic stable equilibrium state.
本文将其受力状态分解为两部分，一是几何稳定平衡状态，二是弹性稳定平衡状态。
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