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Research and development contract for coal mine communication system. Volume 1, Summary and results of system study
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    Published Date:
    1985
    Series:
    Open file report (United States. Bureau of Mines) ; 1985-127
    Description:
    "In its role of providing technical assistance to the mining industry, the Bureau of Mines' Tuscaloosa Research Center has conducted research to develop trapped miner location systems which would aid in locating miners trapped by underground mining d...
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    Published Date:
    2007
    Source:
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    Published Date:
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    Published Date:
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