About: http://webisa.webdatacommons.org/56866905

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	Alternatively, they are plated with a material, thickness of 5 to 20 ??m, such as titanium nitride, titanium carbide, hard chromium, nickel composite material, or the like which are harder than the mother member 1.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es