Coal and Gas Outburst Prevention by Deep-hole Gas Drainage through Drilling Field in Roadside and Head-on Borehole Pressure Relief in Tunneling Faces是什么意思_Coal and Gas Outburst Prevention by Deep-hole Gas Drainage through Drilling Field in Roadside and Head-on Borehole Pressure Relief in Tunneling Faces在线翻译_英语_读音_用法_例句