double bar超棒眼
doubleadj.双重的;成双的;两倍的v.翻一番;使 ... 加倍n.两倍;双份
double-burned dolomite二次煅烧的白云石加氧化铁
double-pivoted pattern双支枢式,双轴尖式
double-o-tube shield双圆盾构
double-deck classifier双层分级机
double current signaling双流信号法
double cover plate joint双盖板结合
double-cropping system一年二熟
double mixing technology双掺技术
double linear prediction双线性预测
double-length notation双倍长表示法, 双长表示法