About: http://webisa.webdatacommons.org/225223351

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	Their natures were mainly governed by the radial and wall-thickness activities of the piezoelectric rings.
http://www.w3.org/ns/prov#wasQuotedFrom	polyu.edu.hk