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		主流城镇污水处理厂厌氧氨氧化菌多样性分析
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			Diversity of anaerobic ammonium oxidizing bacteria in mainstream wastewater treatment plants
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| 图3. AAOB群落组成聚类分析和PCoA分析 | 
| Fig.3. Cluster analysis and PCoA analysis of AAOB community composition | 
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