| http://www.w3.org/ns/prov#value | - It should in fact be noted that the filtering medium that leaves the paper mill already has, in an optimum compromise, the required elasticity for being processed, rigidity for withstanding the thrust of the fluid meant to flow through it, and water repellency; moreover, said medium may be simply inserted, in particular cases, in a small oven suitable to enhance the rigidity characteristic where r
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