Support Technology for Large Cross Section Roadway Driving Along Next Goaf in Fully Mechanized Sub-Level Caving Face in High Stress Three-Soft Seam是什麼意思_Support Technology for Large Cross Section Roadway Driving Along Next Goaf in Fully Mechanized Sub-Level Caving Face in High Stress Three-Soft Seam在線翻譯_英語_讀音_用法_例句