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Plug for a Void, System and Method
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Gas monitor, system and method sensing two different gases
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Method and apparatus for automatically maintaining a desired oxygen level in a refuge
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Method and apparatus for identifying when an idividual is in proximity to an object
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Mine escape self-rescuer system and method
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Gas monitor, gas monitoring system and gas monitoring method
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Gas monitor, system and method
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Method and apparatus for protecting a miner
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Mine WiFi and method
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Change over station and method
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Refuge Chamber and Method
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Air conditioner for refuge shelter, system and method
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Air conditioner for refuge shelter, system and method
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An air conditioning system for a mine refuge
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Yieldable support prop and method
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Sealed modular shelter for providing a breathable atmosphere in a mine
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Refuge Chamber and Method
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Apparatus, system and method for cleaning air
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