Home / Standards / GB/T 34533-2017 GB/T 34533-2017 Abolished Measurement of helium porosity and pulse decay permeability of shale 页岩氦气法孔隙度和脉冲衰减法渗透率的测定 Standard Type GBT ICS 75.020 CCS E12 Status 废止 Issue Date 2017-10-14 Implementation 2018-05-01 Responsible Dept 国家标准委 Drafting Unit N/A