double out双出局doubleadj.双重的；成双的；两倍的v.翻一番；使 ... 加倍n.两倍；双份Double -stage aging双级时效double steel concrete双钢混凝土double - drum drive双滚筒驱动double-bridge crane双桥架式起重机double-chain length双链长度double - deck wagon双层平车double duty regulator双作用调节器double-side tipping双侧倾卸, 两面倾卸double-plate clutch双片式离合器double reduction unit双级减速机