Support Technology for Large Cross Section Roadway Driving Along Next Goaf in Fully Mechanized Sub-Level Caving Face in High Stress Three-Soft Seam是什么意思_Support Technology for Large Cross Section Roadway Driving Along Next Goaf in Fully Mechanized Sub-Level Caving Face in High Stress Three-Soft Seam在线翻译_英语_读音_用法_例句