About: http://webisa.webdatacommons.org/447602811

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	Such an insulative layer may be made of silicon dioxide, for example, or other material which is useful in changing the velocity of a surface wave.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com