double key双键
doubleadj.双重的;成双的;两倍的v.翻一番;使 ... 加倍n.两倍;双份
double vessel disease双支血管病变
double close - loop双闭环
double-contact plug双接点插塞
double-quirked bead双槽间串珠线脚
double grooved pulley双槽滑轮
Double microsurfacing双层微表处
double spark ignition双火花点火
double-acting relay双侧作用继动器
double jet carburetor双嘴汽化器
double helical heater双螺旋灯丝,双螺旋线灯丝