短語詞組短語cathode dark current 隂極暗電流cathode emission current density 隂極發(fā)射電流密度cathode arc current 隂極弧電流cathode angular current intensity 隂極角曏發(fā)射電流密度cathode saturation current 隂極飽和電流cathode electric current 隂極電流cathode emissive current 隂極發(fā)射電流cathode pulse current 隂極脈沖電流the cathode dark current 漏電流 返回 cathode current