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  2. High altitude breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/High_altitude_breathing...

    High altitude breathing apparatus is a breathing apparatus which allows a person to breathe more effectively at an altitude where the partial pressure of oxygen in the ambient atmospheric air is insufficient for the task or to sustain consciousness or human life over the long or short term.

  3. Primary life support system - Wikipedia

    en.wikipedia.org/wiki/Primary_Life_Support_System

    The interior of the Apollo PLSS Diagram of the A7L PLSS and OPS, with interfaces to the astronaut and the Lunar Module cabin. The portable life support system used in the Apollo lunar landing missions used lithium hydroxide to remove the carbon dioxide from the breathing air, and circulated water in an open loop through a liquid-cooled garment, expelling the water into space, where it turned ...

  4. Oxygen breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Oxygen_Breathing_Apparatus

    [1] The scrubber canister uses potassium superoxide as both a carbon dioxide absorbent and as an oxygen source. A sodium chlorate oxygen candle in the base of the unit generates oxygen on start-up as the canister has to reach a high internal temperature before it will start generating oxygen. The circulation of exhaled air containing carbon ...

  5. Nepal government begging Everest climbers to return used ...

    www.aol.com/news/nepal-government-begging...

    As hospitals deal with an influx in cases, oxygen supply is drastically reduced forcing the Nepal Mountaineering Association (NMA) to urge climbers of Mount Everest to return used oxygen canisters ...

  6. IDA71 - Wikipedia

    en.wikipedia.org/wiki/IDA71

    Filling both canisters with soda lime and putting a second oxygen cylinder in the empty space at the bottom, might increase its dive duration to 8 hours. A number of IDA71's have found their way out of the ex-USSR to Europe and America, where recreational divers have added a wing buoyancy compensator and converted them into manually controlled ...

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