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 line cutter双线刻针double fillet weld双填角焊缝double summer time双夏令时间(拨早两小时的日光节约时间)doublegelical gear人字形齿轮double seated type双座型double white lines双白线Double Base Points双基点法double battery gin双滚筒式轧花机double-head draw双头拔制double cooling bed双面冷床