gas mask
Longman Dictionary of Contemporary English 5++LDOCE 5++ˈgas mask noun [countable] 
TPMa piece of equipment worn over your face to protect you from poisonous gases 防毒面具 →5 see picture at 见图 mask1
TPMa piece of equipment worn over your face to protect you from poisonous gases 防毒面具 →5 see picture at 见图 mask1Examples from the Corpus
gas mask• Every child had a gas mask and a suitcase, or paper parcel.• Delaney snapped on his gas mask.• Everywhere I went, I carried the gas mask I had purchased on the black market.ˈgas mask nounChineseSyllable
of Corpus equipment worn piece your a over
gas mask
ˈgas mask
noun [countable]
a piece of equipment worn over your face to protect you from poisonous gases
ˈgas mask
noun [countable]a piece of equipment worn over your face to protect you from poisonous gases