 |
| |||
| directly heated cathode; directly heated cathode filament; filament-type cathode; filamentary cathode; filament | |||
| filament: 6 phrases, 2 sujets |
| Électronique | 4 |
| Industrie | 2 |
|
| |||
| directly heated cathode; directly heated cathode filament; filament-type cathode; filamentary cathode; filament | |||
| filament: 6 phrases, 2 sujets |
| Électronique | 4 |
| Industrie | 2 |