Home / Standards / GB/T 40545-2021 GB/T 40545-2021 Active Guidelines of hydraulic fracturing for coalbed methane well 煤层气井压裂作业导则 Standard Type GBT ICS 73.040 CCS D15 Status 现行 Issue Date 2021-08-20 Implementation 2022-03-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A