headlap搭接重叠部分headn.头部；头脑；顶端；领袖；硬币的正面v.前进；为首；朝向adj.首要的；前面的head per track disk固定头磁盘head injuries/CO头部损伤／并发症head-turned angle头的转动角度head and tail drive头尾驱动head load mechanism磁头加载机构head-down display下视显示器head disk interface头盘界面head handling plant清洗工headwater retention源头保水性Head Testing Branch监考科科长