prevent ground surface settlement technology
...防沉技术；压煤开采；采空区；支撑柱 [gap=980]Keywords : frame construction；prevent ground surface settlement technology；mining under buildings；gob area；support column ..
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prevent ground surface settlement technology
防止地表沉降技术
以上为机器翻译结果，长、整句建议使用 人工翻译 。