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Uncertain degree is evaluated to adopt EDTA titrimetric law to measure total hardness of water quality.
采用EDTA滴定法测定水质总硬度的测量不确定度评定.
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Therefore , this method can be applied into the determination of the total hardness of water.
此方法可用于测定清洁水的总硬度.
［水］硬度???
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