dualtireadj.双轮的dualadj.双重的；成双的n.双数Dual axis orienting mechanism双轴定位机构dual-economy transformation二元经济结构转换dual constant-current source双恒流源Dual controlled release system双重控释系统dual cell type thermal reactor双腔式排气净化热反应堆dual biorthogonal base vectors对俑双正交基向量dual string retrievable packer双管可收回封隔器dual redundant DDV valve block双冗余DDV阀组Dual inverter for two lamps.双重变极器适用于两个灯。Dual- server fault tolerance双机容错