About: http://webisa.webdatacommons.org/48983368

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	A surface hardened layer is formed in a region including the surface by performing a hardening process.02-05-2015
http://www.w3.org/ns/prov#wasQuotedFrom	faqs.org