waste water pollution characteristics
waste water pollution characteristics
废水污染特征
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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As the characteristics of different oils in the industrial waste water and pollution sources of the railway enterprises, the non dispersion infrared photometry is the first selection.
根据铁路主要企业含油工业废水中油种来源及污染源特点，非分散红外光度法为首选方法。
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