About: http://webisa.webdatacommons.org/395931983

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	Therefore, to prevent wear and/or damage of the magnetic disk surface, a protective film made of a hard material such as carbon or the like is formed on a recording layer of the magnetic disk.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com