 |
| |||
| central office line | |||
| линия АТС: 21 phrases in 6 subjects |
| Communications | 1 |
| Computer networks | 1 |
| Mass media | 4 |
| Security systems | 1 |
| Telecommunications | 11 |
| Telephony | 3 |
|
| |||
| central office line | |||
| линия АТС: 21 phrases in 6 subjects |
| Communications | 1 |
| Computer networks | 1 |
| Mass media | 4 |
| Security systems | 1 |
| Telecommunications | 11 |
| Telephony | 3 |