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Modified longwall mining with a German coal planer (plow) in the Pocohontas No. 4 coal bed, Helen, W. Va.

Modified longwall mining with a German coal planer.

Modified longwall mining with German coal planers :summary of operations at five coal mines

Published Year

• 1950-1959 (3)

Subject

• Coal-mining machinery (3)
• Longwall mining--Equipment and supplies (3) *

Author

• Haley, Wilbur A. (3) *
• Dowd, James J. (2)
• Quenon, H. A. (1)
• Turnbull, Louis A. (1)

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