Traditional coal depositional model can hardly explain the cause of this extra-thick coal seam.

传统的煤沉积模式难以解释其超厚煤层的成因。

youdao

Traditional coal depositional model can hardly explain the cause of this extra-thick coal seam.

传统的煤沉积模式难以解释其超厚煤层的成因。

youdao