About: http://webisa.webdatacommons.org/138316628

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 metals, Styrofoam blocks, wood, stone, and other materials can be used to give the desired angle.
http://www.w3.org/ns/prov#wasQuotedFrom	westernexterminator.com