PanLinx

Englisheng-000
filament-type cathode
普通话cmn-000灯丝
Englisheng-000directly heated cathode
Englisheng-000electron-tube heater
Englisheng-000filament
Englisheng-000filamentary cathode
Englisheng-000lamp filament


PanLex

PanLex-PanLinx