About: http://webisa.webdatacommons.org/112803581

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	There is a port drilled into the barrel, this lets gas pass into a tube (called a cylinder) where there is a piston.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com