About: http://webisa.webdatacommons.org/138584183

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	The roughened surface may be formed by a variety of methods, including for example, grit blasting, bead blasting, plasma spraying, chemical etching and a variety of machining techniques.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es