Home / Standards / GB/T 6155-2008 GB/T 6155-2008 Abolished Carbon materials-determination of the true density or porosity 炭素材料真密度和真气孔率测定方法 Standard Type GBT ICS 29.050 CCS Q52 Status 废止 Issue Date 2008-12-06 Implementation 2009-10-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A