About: http://webisa.webdatacommons.org/314207639

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	Tubes 654, 656 extend optical components such as lenses and the like from chamber 652 such that contamination of the optical components by particles is reduced or eliminated.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr