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：2025/12/04
total base number
（ plural ）
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(chemistry) A measurement of the basicity of an oil, expressed in terms of the number of milligrams of potassium hydroxide per gram of oil sample.
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total base number
The mechanic checked the engine oil's total base number to determine whether the lubricant could neutralize acidic contaminants.
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The mechanic checked the engine oil's total base number to determine whether the lubricant could neutralize acidic contaminants.
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