About: http://webisa.webdatacommons.org/409968540

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	They are used to provide security against entry or weather protection at exterior and interior openings in industrial, commercial, institutional and other buildings.
http://www.w3.org/ns/prov#wasQuotedFrom	cornelliron.com