Home / Standards / GB/T 39684-2020 GB/T 39684-2020 Active Test method of thermal irregularities for external window opening 外窗热工缺陷现场测试方法 Standard Type GBT ICS 91.040.01 CCS P32 Status 现行 Issue Date 2020-12-14 Implementation 2021-07-01 Responsible Dept 住房城乡建设部 Drafting Unit N/A