In deep open-pit mine the gutter works for a new level is the emphasis and difficulty.The working schedule and quality are influenced by the blasting effect.是什么意思_In deep open-pit mine the gutter works for a new level is the emphasis and difficulty.The working schedule and quality are influenced by the blasting effect.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句