double channel duplex 双信道双工 ; 双通道双工 ; 双波道双工

duplex double acting pump 双缸复动泵 ; 复式双动水泵 ; 双缸双作用泵

duplex double-action press 二重双动压机

double-acting duplex slush pump 双动双工泥浆泵

duplex double action pump 双缸双作用泵

double current differential duplex 双流差动式双工

double-acting duplex pump 双缸双作用泵

dcd double channel duplex 双通道双工制

double-channel duplex 双频道双工通信

duplex double action press 二重双动压机