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1989年11月16日至19日在北京召开了《铁路航测和遥感第四届动态报告会及第六届科技情报网年会。参加会议的单位有:铁道部建设司、科情所、第一、二、三、四设计院、专业院、隧道局、铁科院西北所、北京、郑州、兰州铁路局、北方、华东交大,上海、长沙、兰州、石家庄铁道学院等27个单位,56名代表。应邀参加会议的还有:中科院遥感所、地理
From November 16 to November 19, 1989, the “Annual Report on the Fourth Aeronautical Survey and Remote Sensing of Railway Survey and the Sixth Annual Scientific and Technological Information Network” was held in Beijing from November 16 to November 19, 1989. The units participating in the meeting are: Construction Department of the Ministry of Railways, Section 1, 2, 3, 4 Design Institutes, Specialized Colleges, Tunnel Bureaus, Northwest Institute of Science, Beijing, Zhengzhou, Lanzhou Railway Bureau, North China, East China Jiaotong University , Shanghai, Changsha, Lanzhou, Shijiazhuang Railway Institute 27 units, 56 representatives. Invited to attend the meeting are as follows: Institute of Remote Sensing, Geography