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With a negative pressure respirator, when you inhale, you pull air through a filter and when you exhale, a valve allows your used air to escape.

asked Aug 27, 2020

Engineering
middle-school

1 answer

0 votes

223k views

Can somebody please answer ASAP!!!!!

asked Apr 20, 2020

Business
middle-school

1 answer

5 votes

149k views

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