About: http://webisa.webdatacommons.org/309801956

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 interior of the cylindrical copper housing is coated with absorbent material such as carbon or graphite so that laser energy reflected from the conical copper reflector is absorbed by the laser beam dump.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com