double net双网doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double-ended synchronization双端同步double back pressure condenser双背压凝汽器Double columns and double FIDs双柱双检测器double-low rapeseed proteins双低菜籽蛋白double-pendulum-type crane二级摆型吊车double circular-arc gear hob双圆弧齿轮滚刀Double -Barrier Quantum Well双势垒量子阱double stepped labyrinth gland双短齿迷宫汽封double-length multiplication双倍长乘法,双字长乘法double-wheel's size of lorry