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Underground mine communications (In Four Parts) 2. Paging systems
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Description:"This Bureau of Mines report summarizes the research, development, and evaluation demonstrations conducted by the Bureau of Mines under the Coal Mine Health and Safety Actof 1969 to improve the means of notifying miners underground, who are away from their own phone, that they are being called." - NIOSHTIC-2
NIOSHTIC no. 10001367
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