Coal Winning Methane Controlling Technology by the Way of Cutting Cross Roadways in Fully- mechanized Coal Mining Faces of Methane Emission Abnormal Zone in Xingtai Coal Mine是什麼意思_Coal Winning Methane Controlling Technology by the Way of Cutting Cross Roadways in Fully- mechanized Coal Mining Faces of Methane Emission Abnormal Zone in Xingtai Coal Mine在線翻譯_英語_讀音_用法_例句