Application of Chemical grouting in leakage-prevention of fine fissure in deep well in west ventilation mine of Xinglong-zhuang coal mine是什么意思_Application of Chemical grouting in leakage-prevention of fine fissure in deep well in west ventilation mine of Xinglong-zhuang coal mine在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句