Double on双行靠
doubleadj.双重的;成双的;两倍的v.翻一番;使 ... 加倍n.两倍;双份
double pane unit双层玻璃窗
double roll feed两边滚子进料
double-ply bag双层袋
Double - inlet双向进气
double canceller二次对消器
double-jointedadj.可屈曲之关节的
double buffering双缓冲
double objective双胶物镜
double-dippingn.双津贴
double telescope双筒望远镜