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Mechanical mining in some bituminous-coal mines :progress report 9 : face haulage
Longwall mining in bituminous coal mines with planers, shearer- loaders, and self-advancing hydraulic roof supports
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Published Year
1960-1969 (2) *
Subject
Coal-mining machinery (2)
Bituminous coal industry--United States (1)
Longwall mining--Equipment and supplies (1)
Mining engineering (1)
Author
Shields, J. J. (2) *
Dowd, J. J. (1)
