| http://www.w3.org/ns/prov#value | - When glass fiber webs having a non-uniform fiber distribution are used, for example, as surfacing felts in the synthetics industry, for example as insulating and decorating plates or as so-called painting felts, there results that in the non-uniform areas of the web there is an uneven porosity resulting in an unequal uptake of the dye, paint or other coating material applied thereon, so that the f
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