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| 围岩稳定性在无支护的条件下，巷道围岩依靠自身的强度保持相对稳定的能力 | |||
| 围岩稳定性 | |||
| stability of surrounding rock: 4 phrases in 3 subjects |
| Explosives and Explosive Ordnance Disposal | 2 |
| Hydroelectric power stations | 1 |
| Technology | 1 |
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