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    Justification of Open Pit Mining Technology for Flat Coal Strata Processing in Relation to the Stratigraphic Positioning Rate

    Justification of Open Pit Mining Technology for Flat Coal Strata Processing in Relation to the Stratigraphic Positioning Rate

    Cyhoeddwyd 2017
    Cael y testun llawn
    Electronig Pennod Llyfr

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