三次静不定结构 thrice statically indeterminate structure
静不稳定结构 statically unstable structure ; Structure statically unstable
静力不稳定结构 statically unstable structures
静不定结构 静不定结构
Statically indeterminate structure
以上为机器翻译结果，长、整句建议使用 人工翻译 。
本文提出和证明了静定、静不定结构重量特性的三个定理，阐明了这个问题的本质。
Therefore, three theorems for weight characteristics of statically determinate and indeterminate structures are presented and proved, and the essentials of the problem are explained in this paper.
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