doubledeckn.双层结构adj.双层的doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double convex ring双凸环double unit system双机制double phase fault双相短路故障double split brush双子电刷double pulse laser双脉冲double cable winch双索卷扬机double flow circle双流环doubledrill column双柱钻架double doffer card双道夫梳理机double beat method双差拍法