| http://www.w3.org/ns/prov#value | - Such liquids include natural and synthetic oils and mixtures thereof, especially oils of the type useful as crankcase lubricating oils for spark-ignited and compression-ignited internal combustion engines, including automobile and truck engines, two-cycle engines, aviation piston engines, marine and railroad diesel engines, as well as gas engines, jet aircraft turbines, stationary power engines an
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