Home / Standards / GB/T 28185-2011 GB/T 28185-2011 Abolished Urban heating unit with heat exchanger 城镇供热用换热机组 Standard Type GBT ICS 91.140.60 CCS P40 Status 废止 Issue Date 2011-12-30 Implementation 2012-10-01 Responsible Dept 住房城乡建设部 Drafting Unit 住房城乡建设部