PPRuNe Forums - View Single Post - MOL on protracted slot at 20.00 on the 22nd. MASKS.
Old 23rd May 2020, 09:08
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jimmievegas
 
Join Date: Oct 2019
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Posts: 14
Originally Posted by OPENDOOR View Post
Is there any research that shows oxygen masks would become ineffective if worn over a face mask?
From personal experience (not related to COVID), they are still effective.
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