| 摘要 |
The invention relates to a breathing apparatus for providing a respirator y gas to a crewmember in a cabin of an aircraft, said breathable apparatus c omprising an air inlet (5) for admission of ambient air in said breathing ap paratus, an additional gas inlet (2) for admission of additional gas in said breathing apparatus, an outlet nozzle (4) for feeding said crew member with the respiratory gas comprising said ambient air and/or additional gas, said breathing apparatus further comprising neutralizing means (70, 141) for neu tralizing at least partially the admission of said additional gas below a pr edefined cabin altitude (Z1).
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