doublelockvt.给 ... 上双锁(特别谨慎地上锁)
doubleadj.双重的;成双的;两倍的v.翻一番;使 ... 加倍n.两倍;双份
double sealed bearing双密封轴承
double single abreast双横队
double-dapped joint双互嵌接合
double helical pinion人字小齿轮
double acid phosphate双料过磷酸钙
double-decked ferry双层渡轮
double export-links双出口
double-decker train双层列车
double strapped joint双盖板接头
double strength glass强力玻璃