:: Bernoulli's principle
:: causes lots more air to be sucked thru the ring as a result.

Hadn't thought of that. =20

As an aside I recall that the place I worked at in the UK thought it was=20
using up to the minute backup technology with it's Bernoulli boxes.

Colin
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CDB, colin@btech-online.co.uk on 16/11/2010
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Web presence: www.btech-online.co.uk =20
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