About: http://webisa.webdatacommons.org/237742240

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	Between the seat 24 and the open end 25 of the duct, the diameter of the duct is reduced, and movably mounted in this portion is a valve actuator 28, movement of which is restricted by two shoulders 30, 32 formed inside the duct 14.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com