| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a longitudinal section of a catheter of a trocar provided with a terminal connector of which an obturating plug in a valve chamber is in an operative position; FIG. 2 is a section similar to FIG. 1 but in which a flexible or other extension has been deflected by a perfusion needle introduced into the terminal connector and into the catheter; FIG. 3 is a p
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