求三本二手书
1
Water Treatment: Principles and Design

Author : MWH Edition : 2
Publisher : Wiley ISBN : 9780471110187

2
Waste Water Engineering: Treatment & Reuse

Author : Metcalf Edition : 4
Publisher : McGraw Hill ISBN : 007124140X

3
Biological Wastewater Treatment: Principles, Modeling, and
Design

Author : Ekama, G.A. Edition : 1
Publisher : IWA Publishing ISBN : 9781843391883

感谢各位了啊，有知道哪里有卖或者什么什么的都告诉我一声啊
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