@a冲击回波法检测混凝土缺陷技术规程= Technical specification for testing of concrete defects by impact echo method@Achong ji hui bo fa jian ce hun ning tu que xian ji shu gui cheng=Technical specification for testing of concrete defects by impact echo method@f中华人民共和国住房和城乡建设部@Fzhong hua ren min gong he guo zhu fang he cheng xiang jian she bu
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冲击回波法检测混凝土缺陷技术规程= Technical specification for testing of concrete defects by impact echo method/中华人民共和国住房和城乡建设部.-北京：中国建筑工业出版社，2017.10
