doubleendadj.双端的(两端引出式)doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double projector双像投影器,立体测图仪double seal coat双封闭层double sided tag双面标签double deflation双重缩减double catalysis二次催化Double paper bag双层纸袋double face mill双面铣刀double frequencyadj.双频率的Double-tax Law两税法double-tonguedadj.舌裂的；欺骗的