noun🔗Share三極真空管A thermionic valve containing an anode, a cathode, and a control grid; small changes to the charge on the grid control the flow from cathode to anode, which makes amplification possible."The old radio used a triode to amplify the weak signal from the antenna, making the music audible. "古いラジオは、アンテナからの弱い信号を増幅するために三極真空管を使用し、音楽を聴きやすくしていました。electronicsdevicetechnologymachineelectricsignalphysicsChat with AIVocabulary GamePractice Reading
