Home / Standards / GB/T 39434-2020 GB/T 39434-2020 Active Technical requirement for ozone treatment recirculating cooling water for central air conditioning 臭氧处理中央空调循环冷却水技术要求 Standard Type GBT ICS 91.140.01 CCS P45/49 Status 现行 Issue Date 2020-11-19 Implementation 2021-06-01 Responsible Dept 住房城乡建设部 Drafting Unit N/A