About: http://webisa.webdatacommons.org/322535700

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	Chamber 1 may contain strengthening elements, such as struts, not shown, and has a back face not visible in FIG. 1, which is typically flat, and may be perforated or non perforated.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es