prov:value
| - Concretely, a reinforcing material such as a glass fiber, a carbon fiber, a steel fiber, an asbestos, a ceramic fiber, a potassium titanate whisker, a boron whisker, aluminum borate, etc.; a silicate-based filler such as a kaolin, clay, wollastonite, talc, mica, etc.; a metal compound such as magnesium hydroxide, cobalt hydroxide, calcium carbonate, barium sulfate, etc., except for the component (
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