A negative pressure respirator brings fresh air to you through a hose Does a negative pressure respirator brings fresh air to you?
If a leak develops in a pressure-demand respirator, the regulator sends a continuous flow of clean air into the facepiece, preventing penetration by contaminated ambient air. ... Negative-Pressure Airflow Negative-pressure respirators draw air into the facepiece via the negative pressure created by user inhalation. ( can I plz have brainliest I need 4 more to have a new rank)
You use expression by explaining your feeling in writing form. Sadness is one of the most expressed feelings in writing. Here is a site to get you an idea if you want to write a story:
https://www.scoopwhoop.com/saddest-lines-from-literature/#.fs19fnc37
Hope it helps!!!