Home / Standards / GB/T 24504-2009 GB/T 24504-2009 Abolished The method of injection/falloff well test for coalbed methane well 煤层气井注入/压降试井方法 Standard Type GBT ICS 73.040 CCS D20 Status 废止 Issue Date 2009-10-30 Implementation 2010-04-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A