| http://www.w3.org/ns/prov#value | - Means is provided for forming a fluid-tight seal between the distal extremity 48 of the valve tube 46 and the distal extremity 53 of the guide wire or tubular member 51 which consists of a resilient seal 61 formed of a suitable material such as an elastomer to provide a fluid-tight seal with respect to the guide wire or tubular member 51 while permitting slidable movement of the valve tube 46 with
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