 |
| |||
| long-distance dialing; trunk dialing; nationwide trunk dialing | |||
| numérotation interurbaine: 6 phrases in 2 subjects |
| Communications | 4 |
| Telecommunications | 2 |
|
| |||
| long-distance dialing; trunk dialing; nationwide trunk dialing | |||
| numérotation interurbaine: 6 phrases in 2 subjects |
| Communications | 4 |
| Telecommunications | 2 |