About: http://webisa.webdatacommons.org/254845166

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	Backing up the gasket 55 is an annular ring in the form of a washer which is preferably made of a relatively rigid material such as metal or stiff plastic which is indicated at 58.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com