About: http://webisa.webdatacommons.org/166910843

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	When the box is made of metal such as aluminum diecast, fitting the cover of the present invention to the metal box causes the exposed area 21a of the cover 2 to make electrical contact with the metal box.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com