... 矿产权 mineral rights 矿产开采 mining explorations 矿产部 ministerio de minas ...
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Since 1992, the highresolution seismic explorations of working areas have been conducted successively in various mine shafts of Yongxia mining district.
1992年以来，永夏矿区各矿井相继进行了采区高分辨地震勘探。
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