About: http://webisa.webdatacommons.org/61836296

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	The pump construction of claim 13, said vent means including an opening in said sealing means, the bellows wall proximate said other end thereof including means for closing said vent opening.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com