Thread: Do you always have oxygen?
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  #6  
Old November 13th 06, 09:26 PM posted to rec.aviation.piloting
Stefan
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Posts: 578
Default Do you always have oxygen?
Sylvain schrieb:

You now find devices -- different brand called Check Mate -- for half
that price.

This one?
http://www.spytechs.com/equipment_other/checkmate.htm