Home / Standards / GB/T 34229-2017 GB/T 34229-2017 Active Coalbed methane well test method—Drill stem testing method 煤层气井试井方法 钻杆地层测试法 Standard Type GBT ICS 73.040 CCS D20 Status 现行 Issue Date 2017-09-07 Implementation 2018-04-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A