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Approved dust respirators for coal mines
Respirators approved by the Bureau of Mines as of May 24, 1972 :a revision of Information circular 8436
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Published Year
1970-1979 (2) *
Subject
Breathing apparatus (1)
Mine dusts (1)
Mine safety (1)
Respirators (1)
Respirators (Medical equipment) (1)
Author
Schutz, Robert H. (2) *
Kloos, E. J. (1)
