 |
| |||
| directly heated cathode; directly heated cathode filament; filament-type cathode; filamentary cathode; filament | |||
| filament: 6 фраз в 2 тематиках |
| Промышленность | 2 |
| Электроника | 4 |
|
| |||
| directly heated cathode; directly heated cathode filament; filament-type cathode; filamentary cathode; filament | |||
| filament: 6 фраз в 2 тематиках |
| Промышленность | 2 |
| Электроника | 4 |