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 hetero-structure laser双异质结构激光器double shearing yield criterion双剪准则double-spindle hammer crusher双轴锤式轧碎机double ring beam bracing system双环梁支护体系double-buffer list technology双缓冲队列技术Double Row Ball Slewing Bearing双排球转盘轴承double-ended gall stone scoop双头胆石匙double foveal visual projection双中心凹视觉投影double-sided double-density双面双密度double-theodolite observation双经纬仪观测