 |
| |||
| telephone signalling | |||
| telephony signaling (oleg.vigodsky) | |||
| телефонная сигнализация: 20 phrases in 5 subjects |
| Computers | 1 |
| Mass media | 15 |
| Military | 1 |
| Security systems | 1 |
| Telecommunications | 2 |
|
| |||
| telephone signalling | |||
| telephony signaling (oleg.vigodsky) | |||
| телефонная сигнализация: 20 phrases in 5 subjects |
| Computers | 1 |
| Mass media | 15 |
| Military | 1 |
| Security systems | 1 |
| Telecommunications | 2 |