Τρίτη 27 Αυγούστου 2013

How Do Gas Masks Work?

Depending on their type and construction, gas masks can be effective against a wide range of substances, from ordinary dust and pollen to poisonous gases — including nerve gases like sarin that act on the central nervous system.



via LiveScience.com http://www.livescience.com/39217-how-do-gas-masks-work.html

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