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ґрадієнт : 38 phrases in 10 subjects |
| Aerodynamics | 1 |
| Aviation | 3 |
| Chemistry | 1 |
| Communications | 1 |
| Mathematics | 1 |
| Metallurgy | 9 |
| Meteorology | 8 |
| Navigation | 2 |
| Road construction | 2 |
| Technology | 10 |
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