double fan双风扇,二联通风机
doubleadj.双重的;成双的;两倍的v.翻一番;使 ... 加倍n.两倍;双份
double certification intermediation“双证”融通
double-primary thoracic-dlsease胸部双源性疾病
double layer antireflection coating双层增透膜,双层减反射膜
double squirrel cage type magnetron双鼠笼式磁控管
Double buried purse-string suture双环埋线
double precision extension register双精度扩充寄存器
double -curvature radius arc gear双圆弧齿轮
double helix tooth synchronous belt双螺旋齿同步带