<http://webisa.webdatacommons.org/prov/42976775> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/395280074> . <http://webisa.webdatacommons.org/395280074> <http://www.w3.org/ns/prov#wasQuotedFrom> <google.ca> . <http://webisa.webdatacommons.org/395280074> <http://www.w3.org/ns/prov#value> "This embodiment is particularly useful when the component contained within the first barrel 110 is photosensitive but it is desired to form the second barrel 120 out of a transparent material." . <http://webisa.webdatacommons.org/395280074> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> .