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 of department部门主任head of the stairs一段楼梯的最上一级head agglutination头凝集head of the family家长head circumference头围head rotated right头向右转head drum pedestal磁头鼓座架head gimbal spring磁头万向弹簧head select signal磁头选择信号head settling time[计] 查找时间, 磁头稳定时间