 |
| |||
| полезная частота (ssn) | |||
| usable frequency: 25 phrases in 12 subjects |
| Antennas and waveguides | 2 |
| Astronautics | 1 |
| Astronomy | 2 |
| Electronics | 1 |
| Information security and data protection | 1 |
| Makarov | 2 |
| Mass media | 2 |
| Military | 3 |
| Physics | 2 |
| Security systems | 1 |
| Technology | 6 |
| Telecommunications | 2 |