About: http://webisa.webdatacommons.org/423062723

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 dielectric window can be composed of quartz, although other dielectric materials, particularly ceramics which do not absorb energy at the frequency of operation, may be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com