About: http://webisa.webdatacommons.org/424972242

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	Free-piston devices are positive displacement fluid power machines which undergo reciprocating motion, without mechanical power transfer, such as a connecting rod to a rotating crankshaft.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com.au