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| нормальное направление | |||
| перпендикулярное направление; направление нормали | |||
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normal direction : 15 phrases in 9 subjects |
| Air defense | 1 |
| Astronomy | 3 |
| Computer networks | 1 |
| Construction | 1 |
| Electrical engineering | 1 |
| General | 1 |
| Information technology | 2 |
| Physics | 4 |
| Technology | 1 |