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  2. Halcyon PVR-BASC - Wikipedia

    en.wikipedia.org/wiki/Halcyon_PVR-BASC

    The fresh gas is added when the counterlung cover bottoms out towards the end of a breath, so the fresh gas is largely inhaled into respiratory dead space, and most of the mixing occurs after exhalation. Excess gas due to expansion during ascent is vented through the overpressure relief valve.

  3. If You're Living With Asthma, Here's Every Single Treatment ...

    www.aol.com/youre-living-asthma-heres-every...

    Treat an asthma attack by visiting the hospital. Every year, more than 1.6 million Americans wind up in the emergency room because of an asthma attack, according to the CDC.If your attack is so ...

  4. Category:Rebreathers - Wikipedia

    en.wikipedia.org/wiki/Category:Rebreathers

    This is a list of makes of rebreather breathing sets, and equipment that incorporates a rebreather. Subcategories. This category has the following 2 subcategories ...

  5. Halcyon RB80 - Wikipedia

    en.wikipedia.org/wiki/Halcyon_RB80

    The Halcyon RB80 is a non-depth-compensated passive addition semi-closed circuit rebreather of similar external dimensions to a standard AL80 scuba cylinder (11-litre, 207-bar aluminium cylinder, 185 mm diameter and about 660 mm long).

  6. Rebreather - Wikipedia

    en.wikipedia.org/wiki/Rebreather

    Breathing gas supply may be surface supplied by umbilical, or from a rebreather carried on the suit. An emergency gas supply rebreather may also be fitted to a suit with either surface supply or rebreather for primary breathing gas. As the internal pressure is maintained at one atmosphere, there is no risk of acute oxygen toxicity.

  7. Rebreather diving - Wikipedia

    en.wikipedia.org/wiki/Rebreather_diving

    In closed circuit rebreathers the breathing loop gas mixture is either known (100% oxygen) or monitored and controlled within set limits, by either the diver or the control circuitry, but in the case of semi-closed rebreathers, where the gas mixture depends on the predive settings and diver exertion, it is necessary to calculate the possible ...

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