Dual law二元法dualadj.双重的；成双的n.双数Dual-wire welding process双丝焊接技术dual-controlled mechanism双重控制机制Dual-Axis Rate Transducer双轴速率变换器dual beam single mode laser双光束单模激光器dual reciprocating diverter双循环分流器dual computer speech system双计算机语音系统dual function approximation二元函数逼近dual lattice-homomorphism对偶格同态dual-tree complex wavelet双树复小波Dual-lock-phase circuit双锁相电路