About: http://webisa.webdatacommons.org/285401051

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	Each stage is formed with a closed circulating gas loop filled with circulating gas having a relatively high specific heat and a relatively high thermal conductivity such as helium.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com