Electric lamp and discharge devices
With luminescent solid or liquid material
Vacuum-type tube
Inventor
active
Active material for nickel electrode and nickel electrode having
Cathode assembly having thermion emitter of cermet pallet
Cathode body, electron gun, and cathode ray tube employing a fer
Cathode for electron tube having an electron-emission layer incl
Cathode ray tube
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Profile ID: LFUS-PAI-P-516865