DCCn.更改设计委员会(设计概念的改变)dcabbr.直流(=direct current)abbr.哥伦比亚特区(=District of Columbia)DC Voltage reference element直流电压基准DC voltage measurement error电压测量偏差DC high voltage power supply直流高压电源DC speed-regulating system直流调速系统DC magnetron co-sputtering直流磁控共溅射DC pulse width speed control直流调速系统DC-magnetic susceptibility直流磁化率DC excited-field generator直流场激发电机DC linear voltagecdstabilized直流线性稳压DC drive speed control system直流调速系统