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I've seen this on rec.scuba:

>    Should a scuba tank cost $150 when a CO2 cylinder costs 1/3 that?  Not
>really, but there are literally millions of CO2 bottles in use around the
>world and relatively few diving bottles.  If you can get as many divers in
>the water as there are people that that drink carbonated beverages you
>would see pricing go down.

   Does anybody has physical data on those CO2 tanks, like capacity, 
max pressure, kind of valve thread, and the like? 

   The obvious implication is "could those be easily adapted for 
underwater use", say stage bottles or whatever?

-----------------Pour la Republique Francaise du Quebec-----------------
Poverty disturbs a democracy;  it shakes a republic.  The former wants a
maximum of solidarity and a few donations. The latter wants a minimum of 
fraternity and a lot of laws.  What one makes foundations do,  the other 
will first ask it's ministries to do.
                   Regis Debray in "Are you a democrat or a republican?"
- Marc Dufour -- [\]ACUC 6 31874 & TDI -- http: will soon be relocated -

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