Backout technics of down fully mechanized mining work face
综采工作面下行拆除工艺
Some people think that we all the old houses entirely without any backout.
一些人认为保护就是把老建筑全体保留下来。
Application Practice of Spontaneous Fire Precaution Technology in Fully Mechanized Top Coal Backout Caving Face
综放回撤面自燃发火预防技术应用实践
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