About: http://webisa.webdatacommons.org/67994514

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 rod (10) may be constructed of other materials e.g. plastics, ceramic, but preferably from a material with a low thermal expansion coefficient e.g. invar.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca