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９月１６日至１７日，第九届全国北方省市墙体材料革新与建筑节能工作交流会在宁夏银川市召开。北方地区的１３个省、自治区、直辖市和１７个省会城市、地级市的墙改办负责人参加了会议，国家经贸委资源节约与综合利用司毕俊生同志和宁夏自治区建设厅副厅长马力出席了会议，部?
From September 16th to the 17th, the 9th National Conference on Material Innovation and Building Energy Conservation of the Northern Provinces and Cities was held in Yinchuan City, Ningxia. The leaders of the wall reform offices of 13 provinces, autonomous regions, municipalities directly under the Central Government and 17 provincial capitals and prefecture-level cities of the northern region attended the meeting. Comrade Bi Junsheng, Department of Resource Conservation and Comprehensive Utilization of the State Economic and Trade Commission, and Deputy Director of Construction of Ningxia Autonomous Region, Ma Li Attending the meeting, the Ministry?