全国交通咨询模拟系统-----全国城市交通图列车时刻表及飞机航班表的编辑。利用VC工具在dos环境下实现全国交通的咨询与管理。-National Advisory traffic simulation system ----- National Urban Transport plans trains and flights Schedules table editor. VC dos tools in the environment under the National Traffic advisory and management.