PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In a VASIMR?? engine, gas such as argon, xenon, or hydrogen is injected into a tube surrounded by a magnet and a series of two radio wave (RF) couplers The couplers turn cold gas into superheated plasma and the rocket???s magnetic nozzle converts the plasma thermal motion into a directed jet.
http://www.w3.org/ns/prov#wasQuotedFrom
  • learnnavi.org