Imported post
quote from rupert from the twin sets thread:
(now trying to remember those diagrams of first stages that i actually managed to get my head round once!)
quote from rupert from the twin sets thread:
is this true? i was under the impression that even if you breathe a tank down to nothing there's still actually 8-10 bar in there that you can't get at.[b said:
(now trying to remember those diagrams of first stages that i actually managed to get my head round once!)