doublenessn.二倍诡计doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double catheterizing cystoscope双侧导尿管膀胱镜double-bowl vacuum centrifuge双鼓真空离心过滤器double ended open jawed spanner双端开口爪形扳手Double frequency BUCK converter双频BUCK变换器double ball track moulding line双球轨浇注线double full breech presentation复臀位double-water internal cooling双水内冷double-layer reinforcing mesh双层钢筋网double-acting hand force pump双作用手摇泵double power asynchronous motor双功率异步电动机