| http://www.w3.org/ns/prov#value | - Fibers of any suitable type can be used, such as fiberglass, alumina, calcium phosphate mineral wool, wollastonite, ceramic, cellulose, carbon, cotton, polyamide, polybenzimidazole, polyaramid, acrylic, phenolic, polyester, polyethylene, PEEK, polypropylene, and other types of polyolefins, or mixtures thereof.
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