Impurities in gasoline are checked by hydrometers at a refinery in United States.
United States USA Date:1925 Duration:44 sec Sound:NO SOUND
Modern methods of oil refining in United States. Hydrometers check gasoline for any impurity at a refinery in United States. The first vapor from the still is condensed into gasoline. It is then tested by hydrometers. Worker checks hydrometers. The impurities in gasoline are removed using sulphuric acid and agitators. Panoramic view of refinery.
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