Assertion: diver's air | /r/CapableOf | pass through regulator first stage
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text: Air from the diving cylinder is subjected to a dramatic reduction in pressure - as much as 220 bar (3,200 psi) from a full 230 bar (3,300 psi) , and 290 bar (4,200 psi) from a full 300 bar (4,400 psi) cylinder at the surface - when passing through the regulator first stage.