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5/1/1997 - Reports of InvestigationsThe article discusses the applicability of computerized signal analysis techniques to identify fault currents existing on coal mine direct-current trolley systems
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1/1/1980 - Reports of InvestigationsThe Bureau of Mines has designed and put into operation a fail-safe control system for use in underground coal mines equipped with methane drainage pipelines. This control system can detect certain unsafe conditions and respond by automatically shutting...
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Content source: National Institute for Occupational Safety and Health, Mining Program