About: http://webisa.webdatacommons.org/99050033

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 valve 2 opening/closing timing may be controlled byapplying a pulsed electrical signal to a solenoid actuator in the valve so the valve is opened and closed at a high frequency, such as 10 Hz or higher.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com