Anh
directly heated cathode
directly heated cathode filament
filament
filament-type cathode
filamentary cathode
Đức
Direkt geheizte Kathode
Pháp
cathode à chauffage direct
cathode à chauffage direct,filament /ENG-ELECTRICAL/
[DE] Direkt geheizte Kathode
[EN] directly heated cathode; directly heated cathode filament; filament; filament-type cathode; filamentary cathode
[FR] cathode à chauffage direct; filament