gas mask
Concise Oxford English Dictionary © 2008 Oxford University Press:
gas mask
▶noun a protective mask used to cover the face as a defence against poison gas.
'gas mask' also found in these Oxford entries:
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gas maskConcise Oxford English Dictionary © 2008 Oxford University Press: gas mask ▶noun a protective mask used to cover the face as a defence against poison gas. 'gas mask' also found in these Oxford entries:
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