急倾斜大倾角特厚易燃煤层综放开采及"三机"配套技术
급경사대경각특후역연매층종방개채급"삼궤"배투기술
Fully-mechanized Caving and ‘Three-Machine' Complete Technique in Steeply Inclined,Very Thick and Inflammable Seam
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