 |
| |||
| indication automatique | |||
|
automatic indication : 5 phrases in 3 subjects |
| Communications | 3 |
| Rail transport | 1 |
| Telegraphy | 1 |
|
| |||
| indication automatique | |||
|
automatic indication : 5 phrases in 3 subjects |
| Communications | 3 |
| Rail transport | 1 |
| Telegraphy | 1 |