About: http://webisa.webdatacommons.org/69794153

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	Air or other breathable gas is supplied to the primary piston-driven ventilation system 14 from the ambient air inlet 59 which passes through a filter 60, e.g. a 0.3 micron filter, and through a check valve 62.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com