About: http://webisa.webdatacommons.org/29808809

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	In the case of electrolytic etching, it is possible to maintain a Ra value within the above-mentioned range by optionally controlling temperature, time, voltage, electric current density, a kind of electrolyte, concentration or the like.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com