double dyevt.染两次doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double crank mechanism双曲柄机构double-layered grate双炉排double-ended clipper两端限幅器; 两端削波器double-H groove weld双Udouble electrode layer双电层double pressure boiler双压式锅炉double-fluid sealing双液体密封double open end wrench双头扳手Double- low rapeseed双低油菜Double-deck spire CT双层螺旋CT