| http://www.w3.org/ns/prov#value | - The insertion part sits in the housing recess in such a way that its underside terminates flush with the housing underside.The advantage of the port system known from WO/05032645, which comprises an active substance chamber, lies in the fact that the insertion part can be produced from a material different from the port housing, for example plastic or metal, in particular titanium or ceramic, with
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