About: http://webisa.webdatacommons.org/29806876

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	In addition, the most characteristic point in the present invention lies in that a space 108 between the head 104 and the anode or the cathode 101 is sustained at a reduced pressure, i.e. at a pressure lower than the atmosphere pressure.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com