doublerolladj.双滚筒的doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double-end graft[医] 蒂状移植物Double Action Only双行动double crown ether双冠醚double edge driver双边驱动器double ventilating双层通风double hull tanker双壳油船double sheetpiling双层板桩double contact key双触键,双接键double prong guard双联护刃器double border lace双面边纹花边