two-side alternate folded collapse method
...方寨unidirectional successive folded collapse method 建筑物双向交替折叠倒塌方案two-side alternate folded collapse method 后座bock ward collapse ..
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two-side alternate folded collapse method
双面交替折叠塌陷法
以上为机器翻译结果，长、整句建议使用 人工翻译 。