Home / Standards / GB/T 33687-2017 GB/T 33687-2017 Active General testing rules for gangue 煤矸石检验通则 Standard Type GBT ICS 27.010 CCS F10 Status 现行 Issue Date 2017-05-12 Implementation 2017-12-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A