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Từ điển Oxford Learners Wordfinder Dictionary
thermionic valve

electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
tube, vacuum tube, thermionic vacuum tube, thermionic tube, electron tube
electronic device
acorn tube, diode, rectifying tube, rectifying valve, electron multiplier,
gas-discharge tube, klystron, magnetron, pentode, television-camera tube, television pickup tube,
tetrode, triode, X-ray tube
Part Holonyms:
circuit, electrical circuit, electric circuit
Part Meronyms:
anode, cathode, electrode, grid, control grid, plate

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