英语词汇“vacuum tube”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-新都网

单词	vacuum tube
释义	vacuum tube 1. Also called, esp. Brit., vacuum valve. an electron tube from which almost all air or gas has been evacuated: formerly used extensively in radio and electronics. 2. a sealed glass tube with electrodes and a partial vacuum or a highly rarefied gas, used to observe the effects of a discharge of electricity passed through it. [1775-85]
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