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Drilling angle measuring instrument and measuring method thereof
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Coal mine gas drainage pipeline gas flow parameter measuring device
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A kind of anti-anchor cable lock that breaks of mining aligning-type Self-unlocking
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A kind of sowing type optical fiber temperature-measurement connecton layout and its wiring method
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A kind of rake optical fiber temperature-measurement connecton layout and its wiring method
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Coal mine is with self solving locking-type anchor cable lock
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A kind of combined anchor anchor cable support apparatus
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Coal mine roadway Portable electric metal mesh Automatic Link Establishment
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Anchorage cable anchoring mode and structure in a kind of loose coal
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A kind of mining tunnel deformation monitoring equipment
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The anticipation maintenance of a kind of colliery Central Pump Room water pump and long-range control method
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Coal dressing magnetic dense medium powder magnetism strengthening device
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Coal dressing magnetite powder magnetism strengthening method
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Whole pulling and moving type whole-process unloading belt conveyor for coal mine underground filling
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Loess-filling coal-mining method in a coal mine
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Special hydraulic support for underground filling coal mining of coal mine
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