About: http://webisa.webdatacommons.org/140496218

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	An upper bulbous point 47 is filled with a gas or other low-density material so that the float plug 46 will float when submerged in circulation fluid.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr