About: http://webisa.webdatacommons.org/116237135

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	It is a characteristic of the key shown that the surface 49 at the base of each valley 48 slopes laterally, i.e., each surface 49 is at an angle other than a right angle relative to the median plane 42 of the blade 34.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com