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Iron Range Research Center
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Automatic warning bell for cage hoists, Leonidas, Minnesota
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Drawing of safety doors, Eveleth, Minnesota
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Locomotive watering device, Spruce Mine, Eveleth, Minnesota
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Safety chains on a skip, Eveleth, Minnesota
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Underground safety stations, Eveleth, Minnesota
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Warning bell used on motor tram cars, Eveleth, Minnesota
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Iron Mines and Mining
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Iron Range Research Center
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