国家建委五局组织了该局科研所、三团预制加工厂、汉中试验室三个单位先后到中国科学院工程力学研究所、哈尔滨市建工局构件厂、黑龙江省低温建筑研究所、沈阳市建工局二公司加工厂、山东省建筑科研所、济南市房管所预制厂等单位,就各种混凝土早强剂的性能、作用及使用情况等进 The State Construction Committee has organized the bureau’s three scientific research institutes, three groups of prefabrication plants, and Hanzhong laboratory to successively go to the Institute of Engineering Mechanics, Chinese Academy of Sciences, the Harbin Construction and Construction Bureau Component Factory, the Heilongjiang Institute of Low Temperature Construction, and Shenyang City Construction. Bureau of Industry and Commerce Company II, Shandong Provincial Institute of Building Research, Jinan City Housing Management Factory, and other units, etc., on the performance, role and use of various concrete early strength agent