Home / Standards / GB/T 27870-2011 GB/T 27870-2011 Active Photocatalyst for air purification 净化空气用光催化剂 Standard Type GBT ICS 71.100.40 CCS G74 Status 现行 Issue Date 2011-12-30 Implementation 2012-09-01 Responsible Dept 国家发展改革委 Drafting Unit N/A