| http://www.w3.org/ns/prov#value | - The proximal segment (122) may be made of a polymeric or metallic material that is relatively stiff and biologically compatible, e.g., high density polyethylene, polypropylene, polyamides such as Nylons, polyurethane, polyimides, polyvinyl chloride, polysulfones, polyfluorocarbons, polyethylene terephthalate, their mixtures, copolymers; or polyester elastomers or a braided shaft (a polymer outer c
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