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一比五万区域地质调查(简称一比五万区调)是一项具有战略意义的综合性很强的基础地质工作,一九八三年地矿部颁发的《1:50000区域地质调查工作要求(试行)》
The one-to-50,000 regional geological survey (abbreviated to the one-to-five-hundred-thousand-area adjustment) is a highly integrated basic geological work with strategic significance. The 1:50000 regional geological survey work was issued by the Ministry of Geology and Minerals in 1983. Requirements (trial)