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There was 75.75% increase on chemical oxygen demand (COD).
生化耗氧量养殖初、末期相比较升高了75.75%；
youdao
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Temperature had an evident influence on chemical oxygen demand (COD) removal.
温度对系统COD去除能力有着比较明显的影响。
youdao
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Temperature had an evident influence on chemical oxygen demand (COD) removal.
温度对系统COD去除能力有着比较明显的影响。
youdao