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List of permissible self-contained oxygen breathing apparatus, gas masks, and hose masks

List of permissible self-contained oxygen breathing apparatus, gas masks, and hose masks

Published Year

• 1930-1939 (2) *

Subject

• Breathing apparatus (2)
• Gas masks (2)
• Mine rescue work--Equipment and supplies (2) *
• Respirators (Medical equipment) (2)
• Self-contained self-rescuer (Mine rescue equipment) (2)

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