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| 地表移动盆地由采矿引起的采空区上方地表移动的范围 | |||
| 下沉盆地; 下沉槽池; 沉陷槽 | |||
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subsidence trough : 3 phrases in 1 subject |
| Explosives and Explosive Ordnance Disposal | 3 |
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