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1/1/1993 - Reports of InvestigationsA unique machine for inducing bending fatigue in wire ropes was built at the U.S. Bureau of Mine's Pittsburgh Research Center. This report provides an analysis of the results of the first wire rope to be fatigued on this machine.
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11/1/1974 - Contract reportsEight coal mines were visited to determine their communications usage and requirements. Volume 4 describes the propagation measurements made in selected mines during the project, along with findings resulting from these measurements.
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Content source: National Institute for Occupational Safety and Health, Mining Program