About: http://webisa.webdatacommons.org/177108481

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	In such case, a passage or opening, such as a hole through the bottom wall of the piston, may be provided so that sealant will be squeezed upwardly through the hole during centrifugation and phase separation.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca