prov:value
| - The fillers useful according to the invention are generally inorganic, and suitable fillers include numerous metals, metal oxides, and inorganic compounds, such as zinc oxide and tin oxide, and barium sulfate, zinc sulfate, calcium carbonate, barium carbonate, clay, tungsten, tungsten oxide, tungsten carbide, an array of silicas, ground particles of cured rubber (which can include recycled core mo
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