| http://www.w3.org/ns/prov#value | - A weighted tip element, particularly for use with a medical device such as a catheter or feeding tube, comprisingan elongated composite body including a tubular outer wall, an inner wall defining with said outer wall an elongated annular clearance, and a plurality of at least substantially coaxial annular members in said clearance, said members being composed of a mixture of a synthetic plastic bi
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