Tips for Scuba Diving & Gear : Open Circuit & Closed Circuit Scuba Diving Systems
Tuesday, February 16th, 2010 at
8:10 pm
Learn how open circuit and closed circuit scuba diving systems work in this free online video lesson.
Expert: John Borg
Bio: John Borg has cut and stacked wood and has cleaned chimneys since young adulthood.
Filmmaker: Blake Borg
Duration : 0:0:55
[youtube wqww9LgYhmc]
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ACUC
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