酸值（AN）也称中和值，指中和1克油品试样中所有酸性物质所需氢氧化钾的毫克数。
Acid Number(AN) Milligrams of KOH required in tests to neutralize all the acidic constituents present in al g sample of a petroleum product.
酸值（AN）也称中和值，指中和1克油品试样中所有酸性物质所需氢氧化钾的毫克数。
Acid Number(AN) Milligrams of KOH required in tests to neutralize all the acidic constituents present in al g sample of a petroleum product.
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