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单词 electron gun
释义

WordReference Random House Unabridged Dictionary of American English © 2024
elec′tron gun′, [Electronics, Television.]
  1. Electronics, Radio and Television, Electricity, Electronicsa device consisting of the cathode ray tube, which emits electrons, and a surrounding electrostatic or electromagnetic apparatus, which controls, focuses, and accelerates the stream of electrons (elec′tron beam′). 
Also called gun. 
  • 1920–25

Collins Concise English Dictionary © HarperCollins Publishers::
electron gun n
  1. a heated cathode with an associated system of electrodes and coils for producing and focusing a beam of electrons, used esp in cathode-ray tubes
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更新时间：2025/7/3 4:06:24