Home / Standards / GB/T 41031-2021 GB/T 41031-2021 Active Liquefied coalbed methane 液化煤层气 Standard Type GBT ICS 75.160 CCS D20 Status 现行 Issue Date 2021-12-31 Implementation 2022-07-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A