About: http://webisa.webdatacommons.org/30813188

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	Most prior art manual sanding blocks include a working surface over which the sandpaper or other material is wrapped.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com