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List of respiratory protective devices approved by the U.S. Bureau of Mines

Testing and design of respiratory protective devices

Published Year

• 1930-1939 (2) *

Subject

• Breathing apparatus (2)
• Respirators (Medical equipment) (2) *
• Gas masks (1)
• Mineral industries--Safety measures (1)

Author

• Schrenk, H. H. (2) *

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