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 reactive magnetron sputtering直流反应磁控溅射DC trilinear digital dynamometer直流三线数字式测力仪DC super position characteristic直流叠加性能DC operation power supply system直流操作电源系统DC rotor speed regulation system直流调速系统DC transistor voltage stabilizer直流晶体管稳压器DCCE Digital Cell Center Exchange数字小区中心交换机数字控制信道DC circuitsurveillance back track直流监视回路DCT for Discrete Cosine Transform离散余弦变换dcconstruction and reconstruction解构与重建