 |
| |||
| operation and maintenance signal | |||
| |||
| orderwire signal | |||
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signal d'exploitation : 5 phrases, 3 sujets |
| Communications | 2 |
| Électronique | 1 |
| Informatique | 2 |
|
| |||
| operation and maintenance signal | |||
| |||
| orderwire signal | |||
|
signal d'exploitation : 5 phrases, 3 sujets |
| Communications | 2 |
| Électronique | 1 |
| Informatique | 2 |