Home / Standards / GB/T 16950-2014 GB/T 16950-2014 Active Geological core drilling tools 地质岩心钻探钻具 Standard Type GBT ICS 73.100.30 CCS D81 Status 现行 Issue Date 2014-03-27 Implementation 2014-10-01 Responsible Dept 自然资源部(国土) Drafting Unit N/A