DDD, DD, Ddynamic load balancing, DDC method construction, Ddi Zhen and Gong Zizhen, DDC DOOR TO DOOR CHARGES, DDR Dial on demand routing, DDS Syndrom when Taking MDT, DDN Access in Access Network, Ddiffusion-weighted imaging, DDC Based on Cordic Algorithm, DDR II Controller Ref Voltage 返回 DDS