DCAn.数字计算机协会dcabbr.直流(=direct current)abbr.哥伦比亚特区(=District of Columbia)DC Voltage Signal Isolated Amplifier直流电压信号隔离转换器DC-to-high-frequency converter直流－高频转换器DC voltage-stabilizer power supply直流稳压电源DC and AC redundancy de-excitation交直流冗余灭磁DC balance resistance testing method直流平衡电阻检测DC voltage- stabilized power supply直流稳压电源DC moving coil rectangular instrument直流动圈式矩形电表DC facing targets magnetron sputtering直流对靶磁控溅射DC sensor-less brushless controllers直流无刷电机控制器dcritical parachute-opening altitude临界高度; 最大工作高度; 最大射高