About: http://webisa.webdatacommons.org/430426872

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	FIG. 7 is a graph plotting the average pressure ratio Pm/Py on the ordinate and the surface roughness Ry of the sealing surfaces on the abscissa.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com