PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Pure gases are considered to be specialty gases when they are used as support gases for laboratory instruments such as chromatographs, mass spectrometers and other various types of analyzers and detectors.
http://www.w3.org/ns/prov#wasQuotedFrom
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