About: http://webisa.webdatacommons.org/440155581

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 catalytic transducer includes a housing, and means, such as a piezoelectric element, for generating ultrasonic waves in response to, for example, a electrical signal supplied by an external power source.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com