doubledutyadj.两用的doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double coil filament双线圈灯丝double curve turnout[电] 双开道岔double-spot tuning双点调谐double-head wrench双头扳手double pipe grouting双重管注浆double-lane system双轨制double-disc harrow双列圆盘耙Double Syllable Verb双音节动词double triangle boom双三角钻臂double-side planer双面刨床