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area structure : 10 phrases in 10 subjects |
| Aviation medicine | 1 |
| Cartography | 1 |
| General | 1 |
| Geology | 1 |
| Geophysics | 1 |
| Gold mining | 1 |
| International trade | 1 |
| Nanotechnology | 1 |
| Oil / petroleum | 1 |
| Technology | 1 |
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