Home / Standards / GB/T 13544-2011 GB/T 13544-2011 Active Fired perforated bricks and block 烧结多孔砖和多孔砌块 Standard Type GBT ICS 91.100.30 CCS Q15 Status 现行 Issue Date 2011-06-16 Implementation 2012-04-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A