About: http://webisa.webdatacommons.org/307670330

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 bracket is formed by pulling molten alumina within a crucible made of an expensive material such as iridium, platinum, etc., onto the upper surface
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com