基本解釋飽和壓降詞組短語(yǔ)短語(yǔ)saturation voltage drop formula 飽和壓降common -emitter forward saturation voltage drop 共發(fā)射極正向飽和壓降saturation voltage drop更多詞組專業(yè)釋義交通運(yùn)輸工程飽和壓降