Home / Standards / GB/T 24529-2009 GB/T 24529-2009 Abolished Carbon materials-determination of open porosity 炭素材料显气孔率的测定方法 Standard Type GBT ICS 29.050 CCS Q52 Status 废止 Issue Date 2009-10-30 Implementation 2010-05-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A