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2/1/2012 - Technology NewsMedium frequency communications systems do not require a powered underground infrastructure to be installed for operation, and may therefore provide a higher degree of survivability after a mine disaster than other types of systems.
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9/1/2004 - Technology NewsThe "Emergency Communication Triangle" safety talk focuses on the content of emergency warning messages. It presents a procedure using mental cues that can be used by senders and receivers of emergency warnings.
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Content source: National Institute for Occupational Safety and Health, Mining Program