The joints investigation of mined-out areas shows that structure surface is dominative factor of roof stability of mined-out area in Jiaguo Mine.是什么意思_The joints investigation of mined-out areas shows that structure surface is dominative factor of roof stability of mined-out area in Jiaguo Mine.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句