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| 有孔度: 30 phrases in 9 subjects |
| Drilling | 1 |
| Engineering geology | 2 |
| Explosives and Explosive Ordnance Disposal | 2 |
| Geology | 1 |
| Geophysics | 4 |
| Metallurgy | 1 |
| Oil / petroleum | 5 |
| Space | 1 |
| Technology | 13 |
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