| http://www.w3.org/ns/prov#value | - Further details of the electrically heatable area heating elements according to the invention will become manifest from the ensuing description, the examples of embodiment and the drawings, in which: FIG. 1a is a perspective view of one embodiment of a textile fabric lined on one side with a plastic lining adapted to be used as a heat irradiating layer in the heating unit provided by the invention
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