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(2)̎��еȝ�ȳ�ˮ,��COD�s��500mg/L��

(3)̎��ĵ͵ȝ�ȳ�ˮ,��COD�s��150mg/L,��

(4)̎��_(d��)��(bi��o)�ĳ�ˮ��COD�s��30mg/L,��

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