コールタールに約1.2％のどのような溶剤を加えて混ぜると、軽油と重油が上下二層に分かれますか？
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コールタールに約1.2％のどのような溶剤を加えて混ぜると、軽油と重油が上下二層に分かれますか？
層別化はあまり明確ではなく、定量化できない指標は扱いにくく、定性も難しい。
破乳剤の効果は試してみるといいですよ。定義しにくい。
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