信函分拣机械化在国外经历了三个阶段,出现过三种类型的分拣机。第一代分拣机采用人工按键分拣;第二代分拣机采用人工标码、自动识码分拣;第三代则是直接识别邮政分拣地址的自动分拣机。一、人工按键分拣机这种设备出现于五十年代。当时美国、英 Mail sorting mechanization has gone through three stages abroad, three types of sorters have appeared. The first generation of sorters using manual key sorting; the second generation of sorters using artificial standard code, automatic identification sorting; the third generation is directly identify the postal sorting address automatic sorter. First, the manual button sorter This equipment appeared in the fifties. At that time the United States, Britain