Home / Standards / GB/T 7702.20-2008 GB/T 7702.20-2008 Abolished Test method for granular activated carbon from coal - Determination of pore volume and specific surface area 煤质颗粒活性炭试验方法 孔容积 比表面积的测定 Standard Type GBT ICS 75.160.10 CCS D24 Status 废止 Issue Date 2008-11-20 Implementation 2009-05-01 Responsible Dept 中国煤炭工业协会 Drafting Unit 中国煤炭工业协会