About: http://webisa.webdatacommons.org/35249622

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 casing 18 is made of an electrically conductive material such as aluminum, the bottom surface of which is formed of a proper number of (in the embodiment shown three) protrusions 181, 182 and 183.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com