 |
| |||
| тональная телеграфия; частотная телеграфия | |||
| частотная телеграфная связь | |||
| частотное телеграфирование | |||
| frequency telegraphy: 44 phrases in 10 subjects |
| Communications | 3 |
| Electrical engineering | 1 |
| Electronics | 4 |
| Household appliances | 1 |
| Makarov | 1 |
| Mass media | 7 |
| Military | 3 |
| Rail transport | 1 |
| Technology | 13 |
| Telecommunications | 10 |