Respirators
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Davis, R. W. Gorman
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Article
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1939
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Wiley (John Wiley & Sons)
โ 364 KB
111 this,papcr tlic term " rcspirntor " is npplictl to ntiy tlcvicc or nppliiiiicc tlcsigttctl to itfford protectioii to thc respiratory o r p i s of its wearer. I t u.ill ctnbracc, tlicrcforc, the siniplcst iititl the most clnl)orutc, but cnch type will be giveii n title or dcscriptioti, of which i