• 含铀主要程度属于半暗-亮、-亮及亮-暗煤

    Uranium, germanium-bearing coals are mainly lignites of low grade incoalation and belong to semidurain, semiclarain.

    youdao

  • 含铀主要程度属于半暗-亮、-亮及亮-暗煤

    Uranium, germanium-bearing coals are mainly lignites of low grade incoalation and belong to semidurain, semiclarain.

    youdao

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