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 side capacitor vohage control直流侧电容电压控制DCPD-containing phenolic resin双环戊二烯酚树脂DCIU Data Control Interface Unit数据控制接口单元DC magnetron reactive sputtering直流磁控溅射DC sputtering at low temperature低温直流溅射DC transistor current stabilizer直流晶体管稳流器DCA Systems Engineering Facility国防通信局系统工程处DC motor regulatiug speed system直流调速系统DC stringing electric locomotive直流架线式电机车DC magnetic bias blocking device直流偏磁抑制装置