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"MontyJ" wrote in message om... saw this on ebay http://cgi.ebay.com/ebaymotors/ws/eB...tem=2489220926 Diving underwater with marine-plywood to keep the water presure out?? Hmmm, each 33 feet of depth is another atmosphere. Atmosphere is what, 14.7 psi? So 33 feet is 29.4 psi? Wonder how much presure plywood can take? |
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