| http://www.w3.org/ns/prov#value | - The features 220, 222 may be comprised of any suitable material, including thermoset plastics such as silicone, fluorosilicone, synthetic rubber and fluoropolymer elastomers such as Viton??? (DuPont Performance Elastomers), perfluoroelastomers such as Kalrez??? ((DuPont Performance Elastomers), other polymers within these families, other polymers, or any combination of these, to name a few.
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