About: http://webisa.webdatacommons.org/172282250

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	The nozzle is then excited at a selected frequency, e.g. 7.5, 10.0 or 12.5 HZ and the duty cycle is varied over the range of operational limits to provide the desired flowrate.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com