 |
| |||
| contrôle par retour de l'information | |||
| information feedback: 7 phrases in 5 subjects |
| Communications | 3 |
| General | 1 |
| Medical | 1 |
| Telegraphy | 1 |
| Transport | 1 |
|
| |||
| contrôle par retour de l'information | |||
| information feedback: 7 phrases in 5 subjects |
| Communications | 3 |
| General | 1 |
| Medical | 1 |
| Telegraphy | 1 |
| Transport | 1 |