Reader's Dictionary
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Urdu Meanings, Pronounciation and Synonyms:

thermionic tube

(Pronunciation -تلفظ سنیۓ ) US:
Slow
Normal
Noun: thermionic tube
1. thermionic tube [ Synonyms: electron tube, thermionic vacuum tube, thermionic valve, tube, vacuum tube]
Electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope

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