About: http://webisa.webdatacommons.org/345509453

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	A disc 174, which is preferably formed of a high-strength material such as steel and functions to suspend the operable panel at track intersections, is mounted on a stepped-down neck portion 176 of trolley bolt 172.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com