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прямой спектр : 27 phrases in 9 subjects |
| Electronics | 1 |
| Information technology | 2 |
| Makarov | 4 |
| Mass media | 6 |
| Mathematics | 2 |
| Military | 2 |
| Security systems | 5 |
| Technology | 3 |
| Telecommunications | 2 |
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