About: http://webisa.webdatacommons.org/209914339

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	Preferably made of aluminum, waveguide system 310 also may be constructed of other metals, such as copper or stainless steel, or other conducting material.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com