Home / Standards / GB/T 397-2022 GB/T 397-2022 Active Commercial coal quality—Coal for coke making 商品煤质量 炼焦用煤 Standard Type GBT ICS 73.040 CCS D24 Status 现行 Issue Date 2022-10-12 Implementation 2022-10-12 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A