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| условия нулевой видимости и нулевой высоты нижней кромки облаков | |||
| zero-zero condition: 22 phrases in 12 subjects |
| Aviation | 1 |
| Computer networks | 1 |
| Economy | 1 |
| Information technology | 4 |
| Makarov | 1 |
| Mathematics | 2 |
| Military | 3 |
| Nanotechnology | 2 |
| Technology | 3 |
| Telecommunications | 1 |
| Thermal engineering | 2 |
| Transport | 1 |