Double J双J管doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double crank双曲柄double drill双钻double visit复诊doubleburnedn.烧透double truss[医] 双侧疝带double helix二重螺旋线double tread双层胎面,双料胎面double reply二次应答double-dyev.染两次double seams双重封罐法