About: http://webisa.webdatacommons.org/132209782

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 kind of the filter used in the present invention is not specified, but it is recommended to use a filter made of a sintered metal such as copper, bronze, stainless steel, nickel, monel metal, silver, platinum or the like.
http://www.w3.org/ns/prov#wasQuotedFrom	patentgenius.com