About: http://webisa.webdatacommons.org/46546234

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	It will be clear that the vents described may be used in systems employing a liquid other than water provided the float and piston are re-dimensioned.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com