About: http://webisa.webdatacommons.org/91800411

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	FIG. 23B is a plan view of the additional envelope blank of a polygonal Type IA retraction device showing how a suction skirt according to the invention is formed from the additional envelope blank.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es