Home / Standards / GB/T 1575-2018 GB/T 1575-2018 Active Determination of yield of benzene-soluble extract in brown coals 褐煤的苯萃取物产率测定方法 Standard Type GBT ICS 73.040 CCS D21 Status 现行 Issue Date 2018-02-06 Implementation 2018-09-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A