About: http://webisa.webdatacommons.org/345933796

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	It may be advantageous or necessary to prestress the piezoelectric actuator by a tensing device, such as a spring, such that piezoelectric elements contained in the actuator are constantly in compression.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com