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You use CO2 scrubbers... which are units that use
sodalime or other chemical means to remove/capture CO2 from the air, and then
you replenish the O2 from preasurized stores of O2 or Regular air. I believe
their's an article on psubs.org somewhere that gives you the rules of thumb for
how much air capacity you need per person
and all the deepflight subs can be found at http://www.deepflight.com/
George H. Slaterpryce III
That's MR. PIG. to you!
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