About: http://webisa.webdatacommons.org/242631434

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	In order to lend rigidity to the construction, especially in view of the fact that the side walls of the heating chambers are made very thin, a suitable number of stays 24 (Fig. 3) may be provided between the walls of such chambers.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com