Home / Standards / GB/T 17785-1999 GB/T 17785-1999 Abolished Standard guide for radon control options for the design and construction of new low rise residential buildings 新建低层住宅建筑设计与施工中氡控制导则 Standard Type GBT ICS 91.090 CCS P33 Status 废止 Issue Date 1999-09-03 Implementation 2000-04-01 Responsible Dept 住房城乡建设部 Drafting Unit N/A