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 Supervisory Control System直流监控系统DC optical current transducer直流光学电流互感器DC-based deicing technology直流融冰技术DC rectification power system直流整流电源dcufnessof infeltioas dislasc传染病源性毒DC solenoid for valve control直流阀用电磁线圈DC variable--speed system直流调速系统DC DOUBLE ARM ELECTRIC BRIDGE型直流双臂电桥DC protective circuit breaker直流断路器DCPD-containing epoxy resin双环戊二烯环氧树脂