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Oil coolers can be divided into air-cooled oil coolers and water-cooled oil coolers according to different heat exchange media, mainly used to cool hydraulic oil and lubricating oil; oil coolers are widely used in plastic machinery, construction machinery, mining machinery, Automobile, steel, wind power, aerospace and other industries. There are many types of oil coolers. Water-cooled oil coolers are divided into tubular oil coolers and plate oil coolers. Among them, plate oil coolers are further divided into removable plate oil coolers (removable plate heat exchangers) and brazing oil coolers. Welded plate oil coolers (brazed plate heat exchangers); air-cooled oil coolers are divided into tube-fin type and plate-fin type.