• The drill hole size selected should provide sufficient representative sample material for analysis and reference.

    钻孔尺寸选定提供足够有代表性样本剖析材料参考

    youdao

  • The drill hole size selected should provide sufficient representative sample material for analysis and reference.

    钻孔尺寸选定提供足够有代表性样本剖析材料参考

    youdao

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