In the Gudan mining district of Siding Lead-Zinc Mine, development has been carried out through driftway.
泗 顶铅锌矿的古丹矿区采用平窿开拓,其最低开拓中段以下尚赋存有规模不大的矿体。
词典释义:
n. 通路;通道;牲畜通道;小径;通行道
In the Gudan mining district of Siding Lead-Zinc Mine, development has been carried out through driftway.
泗 顶铅锌矿的古丹矿区采用平窿开拓,其最低开拓中段以下尚赋存有规模不大的矿体。
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