track circuit
| with
| polarized relay
| track circuit | |
| transp. el. | circuito di binario |
| with | |
| gen. | con |
| polarized relay | |
| el. | relé polarizzato |
| |||
| circuito di binario | |||
|
track circuit : 64 phrases in 5 subjects |
| Communications | 2 |
| Electronics | 4 |
| Information technology | 4 |
| Rail transport | 16 |
| Transport | 38 |