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фиксированный угол : 15 phrases in 11 subjects |
| Astronautics | 1 |
| Aviation | 1 |
| Biotechnology | 1 |
| Drilling | 1 |
| Energy industry | 1 |
| General | 1 |
| Mass media | 4 |
| Oil / petroleum | 1 |
| Oilfields | 2 |
| Solar power | 1 |
| Technology | 1 |
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