double nut双螺帽
doubleadj.双重的;成双的;两倍的v.翻一番;使 ... 加倍n.两倍;双份
double lever safety valve双杠杆安全阀
double-current catheter温特尼茨(氏)探子, 双腔导管
Double-Quality Teachers双师素质教师
double beam oscillography双电子束示波法
double-cantilever crane双悬臂起重机
double insurance policies[经] 双重保险单
double-variables theory双变量强度理论