Signaling System
7
| signaling system | |
| earth.sc. el. | commande électrique |
| |||
| commande électrique | |||
| protocole de signalisation; système de signalisation | |||
|
Signaling System : 20 phrases in 5 subjects |
| Communications | 4 |
| Electronics | 4 |
| Information technology | 5 |
| Mechanic engineering | 2 |
| Telecommunications | 5 |