| http://www.w3.org/ns/prov#value | - Examples of such cryogenic liquid refrigerant materials include, for example, freon 14 (freezing point 128??? K., boiling point 145??? K.); freon 22 (boiling point 233??? K.); freon 13 (boiling point 192??? K.); liquefied air, normally gaseous hydrocarbons, such as propane and isobutane, helium, argon, etc.
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