Talking about the Prevention and Control of the Natural Combustion of the Emaining Coal in the Worked-out Section of the Lower Leaf Faces of the Extra-high Seam是什么意思_Talking about the Prevention and Control of the Natural Combustion of the Emaining Coal in the Worked-out Section of the Lower Leaf Faces of the Extra-high Seam在线翻译_英语_读音_用法_例句