Page:Niosh tb guidelines.pdf/46

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V.   NIOSH Recommendations for Personal Respiratory Protection
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Figure 3—Example C of a NIOSH-Certified, Positive-Pressure, Air-Line, Halfmask Respirator (MSA Pressure Demand Air-Line Respirator, NIOSH approval TC-19C-158).

A different MSA positive pressure halfmask respirator
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