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由建设部科技委地下管线管理技术专业委员会组织的“地下管线普查技术讲座”于１９９９年８月１９日至２４日在云南省昆明市举行，建设部规划司、广州市规划局、北京市测绘局、天津市建委管线普查办、广西国土测绘院、武汉、西宁、秦皇岛三城市自来水公司以及昆明市的有关部门?
The “Underground Pipeline Survey Technology Seminar” organized by the Technical Committee of the Underground Pipeline Management Technology of the Science and Technology Committee of the Ministry of Construction was held in Kunming, Yunnan Province from August 19 to 24, 1999. The Planning Department of the Ministry of Construction, the Planning Bureau of Guangzhou City, and the Surveying and Mapping of Beijing Municipality Bureau, Tianjin Construction Commission Pipeline Survey Office, Guangxi Land Surveying and Mapping Institute, Wuhan, Xining, Qinhuangdao Water Supply Company and relevant departments of Kunming City?