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    vacuum tube

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    vacuum tube

    Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++
    Related topics: Electrical
    ˈvacuum ˌtube noun [countable] American English  TEEa valve(3) 真空管
    Examples from the Corpus
    vacuum tube• Just another snooty $ 3,000 vacuum tube amplifier, I thought.• The ideal atmosphere for the vacuum tube is no atmosphere at all, or a perfect vacuum.
    ˈvacuum ˌtube nounChineseSyllable
    valve(3) a Corpus


    vacuum tube
    ˈvacuum ˌtube noun [countable] American English
    a valve(3)