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38.20 Anti freezing preparations and prepared de icing fluids.
This heading covers anti freezing preparations and prepared de icing fluids (e.g., mixtures with a basis of glycol derivatives).
Some anti freezing preparations also act as coolants or as heat exchange agents.
It does not cover, however, prepared additives for mineral oils or for other liquids used for the same purposes as mineral oils (heading 38.11).
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