About: http://webisa.webdatacommons.org/211359554

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	These components 28 and 29 are made of a rigid insulating material such as wood, bakelited cardboard or ceramic.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com