What the?? Air on or off???
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05-04-2008, 10:49 PM,
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Re: What the?? Air on or off???
Don't we already have a device like this? It's called a pressure gauge. If you had checked your pressure on the surface like I was taught to do as part of my final predive check it would have read low pressure after having taken 2 breaths after the valve had been closed.
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