娱网棋牌

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              1. 污水处理
                Urban sewage treatment
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                王新庄污水处理厂位于郑州市七里河与东风渠交汇处,设计处理规模 40万吨/日,2000 12月建成通水,设计出水水质执行《城镇污水处理厂污染物排放标准》(GB18918-2002)的二级标准。