真空膽

真空膽，又叫閥門，中國內地、東南亞叫眞空管，係電子學上面嘅邏輯門，用來起電路控制，通常係一枝枝入面無空氣嘅玻璃管，已經差唔多被半導體取代。

真空膽

睇埋

膽機

呢篇同邏輯相關係楔位文。歡迎幫維基百科擴寫佢。

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