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Carbide insert bit drilling at the Cleveland-Cliffs Iron Co. mines, Ishpeming, Mich.

Ventilation-air heating plants of the Menominee Range

Published Year

• 1950-1959 (2)

Subject

• Iron mines and mining--Michigan (2) *
• Carbide cutting tools (1)
• Drilling and boring machinery (1)
• Mine ventilation (1)

Author

• Lewis, Walter E. (2) *

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