北方地区建筑砌块生产与应用经验交流会开幕词中国建筑砌块协会副理事长李国泮备位来宾、同志们、朋友们：由中国建筑砌块协会召开的北方地区建筑砌块生产与应用经验交流会现在开幕了。参加这次会议的单位和代表来自北方１３个省、市、自治区。我谨代表中国建筑砌块协会向... The Opening Ceremony of the Experience of Building Blocks Production and Application in Northern China Opening Ceremony Vice Chairman of the China Building Blocks Association Li Guozhen Prepared guests, comrades and friends: exchange of building block production and application experience in the northern region convened by China Building Blocks Association It will open now. The units and representatives participating in the conference were from 13 provinces, cities and autonomous regions in the north. On behalf of the Chinese Building Block Association, I would like to ...