About: http://webisa.webdatacommons.org/216880570

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 projection unit may be balanced such that at least one of the output beams is substantially level and other beams thus indicate plumb or square.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com