double fan双风扇,二联通风机
doubleadj.双重的;成双的;两倍的v.翻一番;使 ... 加倍n.两倍;双份
double-ended spherical-top tube双封闭球头筒
double-channel adjustable spanner双道可调扳手
double-tube bracket light support双筒壁灯架
double tone television transmission双伴音电视传输
double-chamber piezoelectric pump双腔压电泵
double acting viscous cement damper双向胶泥吸能器
Double carotid chromatic ultrasonic颈部血管彩超
double-bus double circuit breaker双母线双重断路器