About: http://webisa.webdatacommons.org/17483429

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	particles and other foreign matter falls through the upper end of the tank to accumulate at the inside, it is often necessary, for sanitation purposes, to remove the pressure head to clean the tank and the plate guide mechanism.
http://www.w3.org/ns/prov#wasQuotedFrom	patents.com