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The factor of safety in mine electrical installations
Portable electric mine lamps
Electrical accidents in mines :their causes and prevention
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Published Year
1910-1919 (3)
Subject
Electricity in mining--Safety measures (3) *
Electric lamps, Portable--Design and construction (1)
Electric lamps, Portable--Safety measures (1)
Mine accidents (1)
Mine explosions--Prevention (1)
Author
Clark, H. H. (3) *
Ilsley, L. C. (1)
Randolph, H. F. (1)
Roberts, W. D. (1)
