Home / Standards / GB/T 19139-2012 GB/T 19139-2012 Active Testing of well cements 油井水泥试验方法 Standard Type GBT ICS 75.020 CCS E13 Status 现行 Issue Date 2012-12-31 Implementation 2013-07-01 Responsible Dept 国家标准委 Drafting Unit N/A