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Shot firing in coal mines by electricity controlled from outside

Suggested safety rules for installing and using electrical equipment in bituminous coal mines

Published Year

• 1910-1919 (2)

Subject

• Electricity in mining (2)
• Coal mines and mining--Safety measures (1)

Author

• Clark, H. H. (2)
• Means, Charles M. (2) *
• Breth, N. V. (1)

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