This is a web site about Air Supply Pumps for Underwater Habitats.
The address is [ http://www.subseacities.com/AirSupplyPumps.html ] but the contents of this web site is still... [under construction]
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I have done some research on Air Supply Pumps for Underwater Habitats. There are a variety of types. Most air compressor have poor efficency so I am researching how to design high efficency air supply pumps.