double six双六doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double ported valve双口阀double transversion双颠换double-fried pork回锅肉double-mode field双模场double entry charge复式计算double-gable roof双脊屋顶double skins facade双层幕墙double gripper feed双夹持进料double time service双授时double cross points复式交分道岔