| |||
| signal sur onde de sol; signal transmis par l'onde de sol | |||
|
ground-wave : 21 phrases in 5 subjects |
| Astronomy | 1 |
| Communications | 13 |
| Electronics | 5 |
| Information technology | 1 |
| Radio | 1 |
| |||
| signal sur onde de sol; signal transmis par l'onde de sol | |||
|
ground-wave : 21 phrases in 5 subjects |
| Astronomy | 1 |
| Communications | 13 |
| Electronics | 5 |
| Information technology | 1 |
| Radio | 1 |