About: http://webisa.webdatacommons.org/288216032

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The flat top is provided with a central wrench depression 123 of hexagonal or octagonal shape, whereby a separate turning device such as wrench is used to insert the screw rod 120 into the pedicle.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es