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Why miners' portable electric lamps require safety devices
Are flame safety lamps suitable for detecting petroleum vapors?
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Published Year
1920-1929 (2) *
Subject
Safety lamps (2) *
Electric lamps, Portable (1)
Mines and mineral resources--Equipment and supplies (1)
Mines and mineral resources--Research (1)
Author
Hooker, A. B. (1)
Ilsley, L. C. (1)
Yant, W. P. (1)
Zellers, D. H. (1)
