Home / Standards / GB/T 19224-2017 GB/T 19224-2017 Active Determination of the relative degree of oxidation in bituminous coal 烟煤相对氧化度测定方法 Standard Type GBT ICS 73.040 CCS D21 Status 现行 Issue Date 2017-09-07 Implementation 2018-04-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A