Analysis on Outburst Prevention Role of Pre-Cracking Control and Soft Blasting in Deep Bore Hole of Low Permeability Seam是什么意思_Analysis on Outburst Prevention Role of Pre-Cracking Control and Soft Blasting in Deep Bore Hole of Low Permeability Seam在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句