Home / Standards / GB/T 15218-2021 GB/T 15218-2021 Active Classification for reserves of groundwater resources 地下水资源储量分类分级 Standard Type GBT ICS 07.060 CCS D14 Status 现行 Issue Date 2021-03-09 Implementation 2021-07-01 Responsible Dept 自然资源部(国土) Drafting Unit N/A