oxygen mask meaning in Hindi

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In 2005, a redesign of the HAC added toilets and oxygen masks.
And the oxygen masks had popped out and were dangling from above.
With an oxygen mask, the police manage to save Wong from coma.
Oxygen masks dropped from the ceiling after the explosion, the passengers said.
They also reported that oxygen masks were dangling in the passenger cabin.
He used the pretext that they interfered with the airplane's oxygen masks.
Sometimes the men had to pry oxygen masks from their frozen faces.
He confesses to dotting flight attendants as they demonstrate the oxygen mask.
He said his ears popped and the oxygen masks then came down.
Some early airliners had oxygen masks for the passengers for routine flights.

noun.

a breathing device that is placed over the mouth and nose; supplies oxygen from an attached storage tank