| http://www.w3.org/ns/prov#value | - In one particular technique, the filter (or sieve) consists of a drum covered with a filter cloth (or felt) installed in a tank (or vat) containing the suspension; since the drum rotates in the tank, the hydrostatic pressure forces some of the water to pass through the felt, whereas the solids, that is to say notably the cellulose fibers, the cement particles and other additives, build up on the s
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