Objective To find out the reason of "dithering" of exhalation valve plate in pressure oxygen mask under high overpressure condition.
The cabin will be pressurized; as on airline flights, oxygen masks will be for emergencies only.
If there is a loss of cabin pressure，an oxygen mask will come down from overhead．
The failure caused the cabin to lose pressure instantly and the oxygen masks to deploy.
The labels also include images of a smoker wearing an oxygen mask and a mother and baby with smoke swirling nearby.
They tell you to put your oxygen mask on first and then help your child with his.
They have to be psychologically mature, have a great deal of mining experience and be able to handle a quick training on how to use the harness and oxygen mask in the phoenix capsule.
And I entertained him for 10 minutes, laughing through his oxygen mask and respirator.
Passengers who have severe altitude illness should ask for an oxygen mask.
