| |||
| circuit direct; ligne directe; circuit télégraphique direct | |||
|
direct circuit : 28 phrases in 9 subjects |
| Automated equipment | 2 |
| Communications | 11 |
| Electric motors | 2 |
| Electronics | 1 |
| Mechanic engineering | 4 |
| Rail transport | 1 |
| Technology | 1 |
| Telecommunications | 3 |
| Transport | 3 |