Home / Standards / GB/T 23251 GB/T 23251 Active Guideline for coal used in coal chemical technology 煤化工用煤技术导则 Standard Type GBT ICS 73.040 CCS D20 Status 现行 Issue Date 2021-12-31 Implementation 2022-07-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委