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Mark Gresham of PSI - PCI is a renowned industry leader in the dive and compressed gas industry. He debunks myths and disinformation about scuba tanks (formally called cylinders), offering detailed explanations.
By Kenny Dyal4.8
5151 ratings
Mark Gresham of PSI - PCI is a renowned industry leader in the dive and compressed gas industry. He debunks myths and disinformation about scuba tanks (formally called cylinders), offering detailed explanations.

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