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Permissible mine equipment approved during the calendar years 1955-56 :with appended list of manufacturers of flame resistant trailing cables and fire-resistant conveyor belts

Published Year

• 1950-1959 (1) *

Subject

• Coal mines and mining--United States--Safety measures (1) *
• Mines safety--United States--Equipment and supplies (1)

Author

• Gleim, E. J. (1) *

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