doubleleafadj.双翼的doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double swage hammer对击式镦锻机,无砧座锤double-loop towel双面毛圈毛巾double acting relay双侧作用继器double ended boiler双端沸腾器double probe method双探头法double-layer tube双层复合管Double--channel双通道double-type wheel双胎轮double-acting paw双动棘爪Double curtain Wall双层幕墙