double yin重阴
doubleadj.双重的;成双的;两倍的v.翻一番;使 ... 加倍n.两倍;双份
double coated electrode双层药皮焊条
double circuit receiver双调谐电路接收机
double-walled annulus双壁圆环
double-dimension tank双容水箱
double ribbed main beam双肋主梁
double sectioned column两节柱
double acting regulator双级调节器
double disc slide valve双动滑阀
double - layered tube双层管
double-hump resonance双峰谐振