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Hazards of the trolley-locomotive haulage system in coal mines

Published Year

• 1940-1949 (1) *

Subject

• Coal mines and mining--Safety measures (1)
• Mine haulage--Safety measures (1)
• Mine railroads--Safety measures (1) *

Author

• Harrington, D. (1)
• Warncke, R. G. (1)

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