About: http://webisa.webdatacommons.org/65602392

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	These two rings are preferably made of a damping material such as silicone, and they are shown in FIG. 9 in the deformed state after the plug has been tightened.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com