Double-E达宝易doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份double optical path-replacement method双光路替换法double-line and five-flight shiplock双线五级船闸double cylinder circular hosiery machine双针筒圆袜机double-walled carbon nanotubes bearing双壁碳纳米管轴承double polarity pulse amplitude modulati双极脉冲幅度调制double colour electro-engraving device双色电刻机double-sided single-density diskette双面单密度软盘double-rolling pipe-reducing machine双辊缩管机Double-wall single-image radiography双壁单影double water phases extraction technique双水相萃取技术