av11222004 av11222004

20-09-2020
Engineering

contestada

21 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.
A True
B Fase

Respuesta :

burcaawi98 burcaawi98

26-09-2020

Answer:

True

Explanation:

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