double six双六doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double cone antenna双锥形天线double side pasting双面涂板double Z-plasties双Z形成形术double spiral mixer双螺旋混合机double-cone dryer双锥干燥机double entry system复式簿记制度Double-blades BPM双刀片型BPMdouble cross hybrid双杂交种double random phase双随机相位double teacher type“双师型”师资队伍