| http://www.w3.org/ns/prov#value | - Apparatus is already known, particularly for the desalination of sea water by reverse osmosis, which comprises a plurality of elements formed of tubular porous supports, coated externally with a semipermeable membrane and arranged in a bundle in the interior of a fluid-tight casing for the circulation of the liquid being treated, and means for the extraction of a diffused flow which has passed thr
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