| English | eng-000 |
| electron-tube heater | |
| 普通话 | cmn-000 | 灯丝 |
| English | eng-000 | directly heated cathode |
| English | eng-000 | filament |
| English | eng-000 | filament-type cathode |
| English | eng-000 | filamentary cathode |
| English | eng-000 | lamp filament |
| русский | rus-000 | подогреватель катода электронной лампы |