Home / Standards / GB/T 29748-2013 GB/T 29748-2013 Active Coal direct liquefaction - Determination of ash in coal liquefaction residue 煤炭直接液化 液化残渣灰分的测定方法 Standard Type GBT ICS 73.040 CCS D21 Status 现行 Issue Date 2013-09-18 Implementation 2014-03-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A