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Metal Mine Ventilation and its Relation to Safety and Efficiency in Mining Operations

Comparison of Gas Masks, Hose Masks, and Oxygen-Breathing Apparatus

Published Year

• 1920-1929 (2) *

Subject

• Mine safety. (2) *
• Breathing apparatus. (1)
• Gas masks. (1)
• Metal trade. (1)
• Mine ventilation. (1)
• Ventilation, (1)

Author

• Harrington, D. (1)
• Katz, S. H. (1)

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