About: http://webisa.webdatacommons.org/166085735

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	The reaction space, i.e. in this case, the combustion chamber, is otherwise closed, except for minor apertures 5 in its upper part, through which flue gases generated in the combustion reaction can escape.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com