| http://www.w3.org/ns/prov#value | - In addition, in place of the individual or combinations of these fillers, one may utilize up to 50% by weight of the total filler contents and more preferably 15% by weight may be replaced with an inorganic filler, such as alumina, amorphous silica, anhydrous aluminum silicate, barium ferrite, calcium carbonate, mica, feldspar, clays such as kaol in, talc, magnesium oxide, magnesium silicate, neph
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