 |
| |||
| duplex voice communication | |||
| duplex radiotelephone communication | |||
| дуплексная радиотелефонная связь: 4 phrases in 3 subjects |
| Astronautics | 2 |
| Information security and data protection | 1 |
| Military | 1 |
|
| |||
| duplex voice communication | |||
| duplex radiotelephone communication | |||
| дуплексная радиотелефонная связь: 4 phrases in 3 subjects |
| Astronautics | 2 |
| Information security and data protection | 1 |
| Military | 1 |