About: http://webisa.webdatacommons.org/225646065

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	Sheet metal, wood, plexiglas or other materials can be fastened to ledges to accomplish the desired angle.
http://www.w3.org/ns/prov#wasQuotedFrom	unl.edu