About: http://webisa.webdatacommons.org/308625739

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	Any small, relatively uniform particles will work, such as steel grit, copper slag , walnut shells, powdered abrasives, even bits of coconut shell.
http://www.w3.org/ns/prov#wasQuotedFrom	pt-bi.com