| http://www.w3.org/ns/prov#value | - The propellants in general use at this time include low molecular weight hydrocarbons, such as dimethyl ether (oxygenated), propane, butane and isobutane; the chlorofluorocarbons, such as the various materials commercially available under the designation Dymel or Freon; and inert propellants, such as carbon dioxide, nitrogen and nitrous oxide.
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