About: http://webisa.webdatacommons.org/185422173

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	It may, however, have openings which may be larger or smaller, or which may be rectangular in shape, depending upon what is requiredto contain the backfill.The leaf elements 72 may be made up of a mesh such as is shown in FIG. 13.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com