Application of Deep-hole Pre-splitting Blast and Coal Body Reinforcement Technique by Metal Skeleton and Grouting in a Face by Crosscut for Exposing Coal Seam是什么意思_Application of Deep-hole Pre-splitting Blast and Coal Body Reinforcement Technique by Metal Skeleton and Grouting in a Face by Crosscut for Exposing Coal Seam在线翻译_英语_读音_用法_例句