Home / Standards / CJ/T 317-2009 CJ/T 317-2009 Active 地源热泵系统用聚乙烯管材及管件 Standard Type CJ ICS N/A CCS N/A Status Active Issue Date 2009-12-10 Implementation 2010-06-01 Centralized Committee 住房和城乡建设部 Issuing Authority 住房和城乡建设部