About: http://webisa.webdatacommons.org/242540964

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	In one form, the outer tube 170 comprises an aluminum tube however it is envisioned that other materials may be used, such as by way of example, any material that allows electromagnetic radiation to pass transparently there-through.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com