About: http://webisa.webdatacommons.org/196339985

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	Indeed, roughness is the most common measure of surface finish, and parameters such as average roughness (Ra) and mean roughness depth (Rz) are the most commonly specified.
http://www.w3.org/ns/prov#wasQuotedFrom	qualitymag.com