double dyevt.染两次
doubleadj.双重的;成双的;两倍的v.翻一番;使 ... 加倍n.两倍;双份
double milling machine双轴铣床
double-U groove weld双U槽焊
double-sine function双正弦函数
double-magic nucleus双幻核
double-cutting drill双刃钻
double joint swig axle双铰接式摆动轴
double pour chill roll双层冷铸造轧辊
double-current relay双流式继电器
double rhombic antenna双菱形天线
double frequency shift双移频