• This paper analyzes the fabric feature of optic axis of the sandstone in coalbearing series of Tonger well field in Fengfeng mining area by using of microscope.

    河北省峰峰矿区通二井田煤系地层砂岩石英光轴组构特征进行显微镜下的观察分析

    youdao

  • This paper analyzes the fabric feature of optic axis of the sandstone in coalbearing series of Tonger well field in Fengfeng mining area by using of microscope.

    河北省峰峰矿区通二井田煤系地层砂岩石英光轴组构特征进行显微镜下的观察分析

    youdao

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