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| 坍塌区 | |||
| 塌陷区 | |||
| 崩落带; 垮落带采煤工作面推进后，采空区顶板垮落的岩石沿高度方向形成的分带 | |||
| 下沉区 | |||
| caving zone: 2 phrases in 1 subject |
| Explosives and Explosive Ordnance Disposal | 2 |
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