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| 岩石裂缝 | |||
| fracture of rock: 11 phrases in 6 subjects |
| Bridge construction | 1 |
| Drilling | 1 |
| Engineering geology | 3 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Hydroelectric power stations | 1 |
| Technology | 3 |
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