About: http://webisa.webdatacommons.org/223160037

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	pair of spaced vertical walls 32A and 32B joined at the ends by a pair of spaced upper and lower horizontal walls 32C and 32D. The walls are hollow to receive heating and cooling mediums, such as steam and water.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com