DCLn.直接藕合逻辑线路dcabbr.直流(=direct current)abbr.哥伦比亚特区(=District of Columbia)DC power controI直流电源控制DC stabilization直流稳定DC magnetic bias直流偏磁DC krypton lamps氪弧灯DC arc discharge直流电弧放电DC restore diode直流恢复二极管DC electromagnet直流电磁铁dc magnetization直流磁化DC motor starter直流电动机启动器DC arc-furnace直流电弧炉