Home / Standards / GB/T 12719-1991 GB/T 12719-1991 Abolished Exploration specification of hydrogeologyand engineering geology in mining areas 矿区水文地质工程地质勘探规范 Standard Type GBT ICS 73.020 CCS D14 Status 废止 Issue Date 1991-02-04 Implementation 1991-10-01 Responsible Dept 自然资源部(国土) Drafting Unit N/A