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- Permanent roof supports
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5/1/2016 - Peer reviewed journal articlesAn article describing laboratory tests that were conducted to determine the vertical load capacity and deflection of three different types of cross members used in the trusses of coal mine roof support.
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8/1/2001 - Technology NewsAn announcement for Information Circular 9453 - Proceedings: New Technology for Coal Mine Roof Support.
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Content source: National Institute for Occupational Safety and Health, Mining Program