About: http://webisa.webdatacommons.org/342731661

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	ting structure such as a flanged ring carried by the drilling apparatus to axially compress a perimeteral portion of the stripper rubber intocontinuous circumferential sealing engagement with a cooperating surface of the mounting ring.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com