| http://www.w3.org/ns/prov#value | - The face of the composite and the ribs may be made of various materials, including silicone rubbers, urethane rubbers, or fluoropolymer, including fluoroplastics (such as PTFE) and fluoroelastomers, or blends thereof The reinforcement material can be selected from various types of fibers, fabrics, or films, including fiberglass, nylon, polyester, or aramid, preferably a glass fiber, or polyethylen
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