 |
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| засекреченная телефонная связь | |||
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| засекреченная телефонная связь | |||
| secure voice communications: 27 phrases in 9 subjects |
| Astronautics | 2 |
| Communications | 1 |
| Computers | 1 |
| Electronics | 3 |
| Information security and data protection | 1 |
| Military | 14 |
| Security systems | 1 |
| Technology | 2 |
| Telecommunications | 2 |