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Minimizing fire hazards in coal mines by proper circuit-breaker protection of 250/275-volt direct-current systems

Published Year

• 1950-1959 (1)

Subject

• Coal mines and mining--Safety measures (1)
• Electric circuit-breakers (1)
• Electric circuits--Direct current--Safety measures (1)
• Mine fires--Prevention and control (1) *

Author

• Gallagher, F. J. (1) *

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