Application of Colloid Sludge Isolation Technique in Preventing and Extinguishing the Fire in Adjacent Goaf of 7513 Fully Mechanized Coal Face是什麼意思_Application of Colloid Sludge Isolation Technique in Preventing and Extinguishing the Fire in Adjacent Goaf of 7513 Fully Mechanized Coal Face在線翻譯_英語_讀音_用法_例句