 |
| |||
| switching centre; switching telephone exchange; central office | |||
| centrum komutacyjne: 6 phrases in 2 subjects |
| Radio | 3 |
| Telephony | 3 |
|
| |||
| switching centre; switching telephone exchange; central office | |||
| centrum komutacyjne: 6 phrases in 2 subjects |
| Radio | 3 |
| Telephony | 3 |