| |||
| VC-4 signal (oleg.vigodsky); VC4 signal (oleg.vigodsky) | |||
| |||
| STM-4 signal (oleg.vigodsky) | |||
|
4-сигнал : 23 phrases in 8 subjects |
| Electronics | 5 |
| General | 1 |
| Information technology | 1 |
| Makarov | 1 |
| Mass media | 11 |
| Molikpaq | 1 |
| Telecommunications | 2 |
| Vibration monitoring | 1 |