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余岩 : 43 phrases in 9 subjects |
| Desert science | 2 |
| Earth sciences | 1 |
| Electronics | 1 |
| Engineering geology | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 1 |
| Geology | 1 |
| Oil / petroleum | 6 |
| Technology | 28 |
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