About: http://webisa.webdatacommons.org/38596475

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 ceramic valve guide 70 is composed of a material, such as silicon nitride, boron carbide, or any suitable material which has a low coefficient of expansion, generally within the range of 2.5E-6 to 10.8E-6 mm/mm/C???.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com