I don't know enough about the respirators on hazmat suits and how they function to answer your question.
I would guess that there may be several kinds.
Maybe some other FReepers can answer.
posted on 08/04/2014 8:57:26 AM PDT
(Zero, our Nero.)
good tag line
posted on 08/04/2014 11:45:31 AM PDT
(the great tribulation begins)
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