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Be applied to gas comprehensive receiver of geomantic omen linkage construction
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Magnetic induction type automatic drainage device of underground coal mine air pump
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Support method for narrow coal pillar in gob-side entry driving
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Mine roadway rapid sealing method
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Ground L-shaped drilling gas extraction engineering evaluation method on mining-induced fracture zone
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Belt conveyor electric magnetic iron remover automatic control device
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Dustless cleaner
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Separation of coarse slime method and its equipment
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Deep hole presplitting blasting method during initial mining and initial setting period of working face of extra-thick coal seam
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The sliding door of automatic blocking
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Steel plate bending device
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A kind of chain car arrester
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A kind of automatic feedback formula self-walking aerial pressure clear water pump truck
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High-voltage switch gear manual locking device
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No coal column is without pick lane Z-type working face extraction method
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Underground coal mine roof timbering resin explosive roll Fast Installation rifle
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Underground coal mine black water automatic separating apparatus
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Template leakproof pull rod for concreting
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Labyrinth sealing carrying roller
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