About: http://webisa.webdatacommons.org/291168672

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	In the illustration shown in FIG. 5, both the piston and shaft seals 18 and 20, respectively, are rolling diaphragms, however, bellows or other types may of course be utilized.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca