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Staged fracturing and extraction method for long drill hole of coal seam and pressure-extraction integrated device
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Steep coal seam is pitched pseudo-inclined and is adopted working face hydraulic support to one side convenient to remove
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Coal mine underground fracturing control safety guarantee method
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Evaluation method suitable for the detection of coal mine gas extraction borehole sealing quality
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Joint transient electromagnetic, salinity measurement and the pressure break of microseism coverage test method
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A kind of hole sealing device and method for sealing with pressure for the nearly horizontal fractures drilling of coal mine
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A kind of coal bed gas extraction drilling prosthetic appliance
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A kind of hydraulic support for high-dipping stope face
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A kind of shield machine monitoring system
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A kind of advanced drilling machine and shield machine cooperate the method for prying into hole
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A kind of lift bottom method of hydraulic support
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A kind of deflection deviation correction control system of shield machine
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A kind of preceding shield body of coal mine light section shield excavation machine
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A kind of support shoe system of coal mine light section shield excavation machine
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A kind of coal mine light section shield excavation machine
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A kind of construction technology of coal mine light section shield shield excavation machine
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