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An Effort by Deep-Sea Divers to Repair a New York Water Tunnel - NYTimes.com
"The city has enlisted six deep-sea divers who are living for more than a month in a sealed 24-foot tubular pressurized tank complete with showers, a television and a Nerf basketball hoop, breathing air that is 97.5 percent helium and 2.5 percent oxygen."
underground  water  air 
december 2008 by kevan
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