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层 速 度 : 56 phrases in 10 subjects |
| Aviation | 1 |
| Earth sciences | 2 |
| Engineering geology | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Geophysics | 8 |
| Metallurgy | 8 |
| Oil / petroleum | 18 |
| Technology | 14 |
| United Nations | 1 |
| Wind Energy | 1 |
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