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| частотный спектр | |||
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content frequency : 17 phrases in 12 subjects |
| Aviation | 1 |
| Communications | 1 |
| Geophysics | 4 |
| Information technology | 1 |
| Makarov | 1 |
| Mathematics | 1 |
| Metrology | 1 |
| Quantum electronics | 1 |
| Radioengineering | 1 |
| Seismology | 1 |
| Technology | 3 |
| Telecommunications | 1 |