| |||
| вызывной и тарифный импульс (oleg.vigodsky) | |||
|
ringing and metering voltage : 3 phrases in 1 subject |
| Telecommunications | 3 |
| |||
| вызывной и тарифный импульс (oleg.vigodsky) | |||
|
ringing and metering voltage : 3 phrases in 1 subject |
| Telecommunications | 3 |