 |
| |||
| oxide-coated cathode; dull-emitting cathode | |||
| oxide-coated cathode; oxide emitter | |||
| |||
| metallic oxide cathode | |||
|
Oxydkathode : 1 do fraz, 1 tematyki |
| Technika i technologia | 1 |
|
| |||
| oxide-coated cathode; dull-emitting cathode | |||
| oxide-coated cathode; oxide emitter | |||
| |||
| metallic oxide cathode | |||
|
Oxydkathode : 1 do fraz, 1 tematyki |
| Technika i technologia | 1 |