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 CoefficientsDC系数DC-sputtering直流溅射DC Distribution直流配电DC refrigerator直流冰箱DC feeder cable直流馈出电缆DC ground relay直流接地继电器dc power supply直流电源（=direct current power supply）DC pulse plasma交流脉冲等离子体DC series motor串激直流电动机DC/DC module模块电源