| 摘要 |
The present invention is a method and apparatus for a self-contained underwater breathing apparatus (100) in which a breathing gas is supplied to a flow loop (104) from two separate gas sources (110, 112) each having a different oxygen fraction, and each controlled by separate mass flow controllers (120, 122) having variable flow rates. The mass controller flow rates are adaptively adjustable to deliver gas at variable flow rates which depend solely on a function of depth.
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