About: http://webisa.webdatacommons.org/204123847

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 barrel and outer shell 54 may be provided with elements such as screw threads or cam surfaces for controlling the position of the barrel, and hence of the optical elements, relative to the outer shell in the direction along axis 60.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com