 |
| |||
| main exchange; parent exchange | |||
| central switching office; central exchange; central office; district exchange; primary exchange | |||
|
central principal : 13 Phrasen in 5 Thematiken |
| Allgemeine Lexik | 4 |
| Maschinenbau | 2 |
| Politik | 1 |
| Technik | 4 |
| Telekommunikation | 2 |