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Mine hydraulic prop
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Hydraulic prop
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Safety valve for protection of hydraulic prop from static and dynamic loads
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Pneumatic percussion unit with collar valve
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Process of stripping of gently dipping and inclined mineral deposits
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Reversible pneumatic drift
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Pneumatic winch
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Air-operated impact device
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Air impact device
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Vibration source
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Method of unloading frozen coal from railway open-top cars
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