For increasing the utilization efficiency of mineral resources, Yunnan Tin Company Group Limited adopts the filling mining methods for different ore bodies.
云南锡业集团公司为提高矿产资源的利用率，针对不同开采技术条件的矿体，选用与之相适应的充填采矿法开采。
For increasing the utilization efficiency of mineral resources, Yunnan Tin Company Group Limited adopts the filling mining methods for different ore bodies.
云南锡业集团公司为提高矿产资源的利用率，针对不同开采技术条件的矿体，选用与之相适应的充填采矿法开采。
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