About: http://webisa.webdatacommons.org/326622554

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 is made of insulation, such as rubber, and the portion near the operative current-concentrating electrode 2| may be'advantageously constructed of quartz or similar vitreous material, as indicated at 22.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es