| http://www.w3.org/ns/prov#value | - At this time, the reaction can start for stiffening the webs 24, 25, 26, 27, either by radiation such as by means of an influencing source 29, which can, however, also be replaced by a magnetic or electric field source, or by an ultrasound source or by a chemical reaction which can be triggered or conveyed by diffusing in a substance 30 in which the conveying elements move.
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