英语词汇four-level system是什么意思，four-level system的用法、释义、翻译、读音、例句、短语词组-英汉汉英翻译词典

单词	four-level system
释义	four-level system　【电】四水平系统
随便看	excitation excitation excitation excitation excitation anode excitation capacitor excitation capacity excitation choking coil excitation coefficient excitation coil excitation contactor excitation current excitation curve excitation density excitation effect excitation energy excitation function excitation generator excitation impedance excitation index excitation labeling excitation level excitation light source excitation loss excitation mechanism

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