| 21. | Microsoft does not appear ready to strap on the oxygen masks just yet.
|
| 22. | Passenger oxygen masks cannot deliver enough oxygen for sustained periods at high altitudes.
|
| 23. | An oxygen mask was on his face while he was removed by stretcher.
|
| 24. | The ejection was violent, ripping the helmet and oxygen mask from his head.
|
| 25. | The doctor said his choices were surgery or an oxygen mask.
|
| 26. | Oxygen masks were deployed, but failed to appear at four seats.
|
| 27. | In some sections, laborers wear oxygen masks to cope with the thin air.
|
| 28. | He was breathing from an oxygen mask and had visible cuts and bruises.
|
| 29. | The oxygen masks dropped down, which was a little bit of a sign,
|
| 30. | His complexion had improved considerably after they got an oxygen mask on his face.
|
