thermionic valve (0 synonym found)

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thermionic valves

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Definition of thermionic valve:

(n) : an early electronic device incorporating electrons from a glowing cathode inside an evacuated glass tube; functioned as a switch, amplifier etc
Definition of thermionic valve:

(n) : an early electronic device incorporating electrons from a glowing cathode inside an evacuated glass tube; functioned as a switch, amplifier etc
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