About: http://webisa.webdatacommons.org/46432608

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 holding block including a base portion, riser portions projecting upwardly from the base portion to define a seal cavity therebetween, and bearing surfaces disposed at the top of the riser portions;
http://www.w3.org/ns/prov#wasQuotedFrom	google.com