About: http://webisa.webdatacommons.org/368298330

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 tool used in the present invention is desired to be made of a rigid material including a hardened steel and ceramics such as silicon carbide, titanium carbide, and silicon nitride.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com