treatment principle of them
treatment principle of them
它们的处理原则
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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To introduce the current common treatment technologies, bio-chemical treatment and physicochemical treatment, also the principle, application and newest research of them.
介绍了目前印染废水处理行业中常用的生物化学法和物理化学处理法，对其原理、应用及最新研究方向作了重点描述。
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