| http://www.w3.org/ns/prov#value | - Examples of the reinforcing agents include inorganic reinforcing agents such as carbon black, zinc oxide, clay, magnesium carbonate, various grades of silica, silicates, and calcium carbonate; and organic reinforcing agents such as asphaltic materials, phenolic resins, terpene resins, coumarone-indene resin, various natural fibers, and various synthetic and semi-synthetic fibers.
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