Home / Standards / GB/T 479-2016 GB/T 479-2016 Active Determination of plastometric indices of bituminous coal 烟煤胶质层指数测定方法 Standard Type GBT ICS 73.040 CCS D21 Status 现行 Issue Date 2016-12-13 Implementation 2017-07-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A