| http://www.w3.org/ns/prov#value | - The fluid delivery element 14 may comprise a sheet of any suitable material, transparent or opaque, including synthetic, film-forming polymeric materials, e.g., polyvinylacetate, polyvinylchloride, polyvinylchloride-polyvinylalcohol copolymers, polypropylene, polystyrene, cellulose acetate butyrate, hydrolyzed cellulose acetate butyrate and the like; metals, ceramics, etc.
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