electron tube
短语[电] 电子管
词形变化
electron tubes
复数
electron tubes
释义与例句
n.
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1.
Any of several electronic devices that control electron current through vacuum, gas or vapor between electrodes within a sealed container, usually of glass or metal and often designed to be easily installed in and removed from the equipment in which it is used.
电子管
商务 工程 物理