<http://webisa.webdatacommons.org/456433875>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/456433875>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/prov/371071916>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/456433875> .
<http://webisa.webdatacommons.org/456433875>	<http://www.w3.org/ns/prov#value>	"In a preferred improvement of the invention, the cover means is a slide which can be inserted into a guide running at least substantially parallel to the channel, and which is immovably secured to the head of the artificial member in radial direction by means of form locking." .