| |||
| five-electrode tube; pentode tube; three-grid valve | |||
| three-grid tube | |||
| pentode | |||
|
Pentode : 13 phrases, 2 sujets |
| Antennes et guides d'ondes | 7 |
| Technologie | 6 |
| |||
| five-electrode tube; pentode tube; three-grid valve | |||
| three-grid tube | |||
| pentode | |||
|
Pentode : 13 phrases, 2 sujets |
| Antennes et guides d'ondes | 7 |
| Technologie | 6 |