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Coarse coal slime grading system and method
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Portable movable multifunctional tunneling head-on wire correcting rod for coal mine
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Desilting process for large water working face drainage roadway
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Colliery TBM super large chamber construction operation platform
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Mining air duct repairing technology
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Coal seam deep hole blasting pressure relief method for improving blasting effect by using original pressure relief holes
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Extrusion device for replacing slurry during drilling and water pressing and construction process
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One-hole dual-purpose technology capable of meeting underground pressure relief and hydrogen sulfide treatment requirements
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Colliery portable exempts from to glue drawing board
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Device for measuring row spacing between portable magnetic claw supports in coal mine
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Blade-replaceable large-diameter composite sheet hole expanding drill bit
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Pneumatic type spray head positioning and spraying type oil injection device of coal mine winch
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Large-aperture drilling construction process for penetrating through huge-thickness aquifer
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Explosion-proof electric dumping handcart for coal mine
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Coal mine double-plate extrusion fixed type anti-backward-sliding adjustable front canopy lifting ring
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adjustable automatic oiling device for lifting steel wire rope of inclined drift winch
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Comprehensive operation box for underground belt conveyor of coal mine
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Electric portable coal bunker depth detector
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Pipeline flange welding fixer
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A kind of support device for coal mine work area top plate
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