... 后退式回采：bring back 后退式长壁开采：longwall retreating 后退回采：back coming ...
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oblique longwall retreating with underhand 伪倾斜长壁俯采
retreating longwall 后退式长壁开采
retreating g longwall 后退式长壁开采
longwall advancing mining retreating 长壁后退式回采
·2,447,543篇论文数据，部分数据来源于NoteExpress
The paper discusses the application and the effects of the coal mining method with retreating-longwall flexible shield support in steeply-inclined coal seam.
叙述了走向长壁后退式柔性掩护支架采煤法在急斜煤层中的应用及效果。
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