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The tragic events at the Darby, Alma, Sago, and Brookwood No. 5 coal mines have highlighted the need for reliable communications between miners working inside a mine and those outside.
| Author(s): | Schiffbauer-WH, Brune-JF |
| Reference: | Am Longwall Mag 2006 Aug:24-25 |
cmc (PDF, 144 KB)
