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| 自由 孔: 17 phrases in 8 subjects |
| Desert science | 1 |
| Explosives and Explosive Ordnance Disposal | 4 |
| Geophysics | 4 |
| Hydroelectric power stations | 2 |
| Latin | 1 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Technology | 3 |
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