Daily Almanac for
Nov 30, 2009
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gas' mask"




a masklike device containing or attached to a component that filters the air inhaled by the wearer through charcoal and chemicals, for protecting the face and lungs against noxious gases and fumes, as in warfare or in certain industrial processes.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

gas mantlegas meter
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