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How leakage of current from an electric shot-firing circuit causes misfires
Maintaining the permissibility of electric cap lamps
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Published Year
1930-1939 (2) *
Subject
Electricity in mining (2)
Blasting (1)
Electric lamps (1)
Author
Hooker, A. B. (2)
Zellers, Donald Henry, (2) *
Ilsley, L. C. (1)
