oxygen mask
Longman Dictionary of Contemporary English 5++LDOCE 5++ˈoxygen mask noun [countable] 
THBHa piece of equipment that fits over someone’s mouth and nose to provide them with oxygen 氧气面罩 →5 see picture at 见图 mask1
THBHa piece of equipment that fits over someone’s mouth and nose to provide them with oxygen 氧气面罩 →5 see picture at 见图 mask1Examples from the Corpus
oxygen mask• They placed an oxygen mask on my love and dared me to count up to ten.• They coaxed everything from pygmy mice to snakes to cheetahs into running on a treadmill while wearing an oxygen mask.• Reynard wears an oxygen mask and breathes pure air.• The shock was terrific, he gasped into his oxygen mask, his hands clenching involuntarily.• He remembered his oxygen mask and placed it over his mouth after removing the smog mask.• But he saw nothing, nothing but dark sky: The oxygen mask was filled with sweat.• He told me that the oxygen mask had pulled away from my face some, and that I was probably just blacking out.• It felt good sitting there with the oxygen mask off and not having to worry about flak.ˈoxygen mask nounChineseSyllable
Corpus equipment that of fits piece over a someone’s
oxygen mask
ˈoxygen mask
noun [countable]
a piece of equipment that fits over someone’s mouth and nose to provide them with oxygen
ˈoxygen mask
noun [countable]a piece of equipment that fits over someone’s mouth and nose to provide them with oxygen