extremely thick coal seam

 
  • 特厚煤層

extremely thick coal seam的用法和樣例:

例句

  1. Introduced the prevention methods and practice experience for the sixth pit in Xingshang Coal Mine adopted longwall inclined slicing experence mining method.
    介紹了興山礦六井採用傾斜分層走向長壁採煤法開採特厚煤層,防治自然發火的經驗。

extremely thick coal seam的相關資料:

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