| http://www.w3.org/ns/prov#value | - For instance, a localized change can be made to the roughness or any other characteristic of the surface of the web material (preferably affecting the friction coefficient) over a stretch of material corresponding to approximately half a turn, or a full turn, or even a number of turns, e.g. 2 or 3 turns, or an even larger number of turns, for instance coming between 1 and 50, and preferably betwee
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