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Research and development
containing
需氧
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in specified order only
Chinese
English
化学的氧气需求
COD
chemical oxygen demand
氧气需求
oxygen demand
氧气需求, 氮的-NOD
nitrogenous oxygen demand
生物
需氧
量
biological oxygen demand
生物化学的氧气需求
BOD
biochemical oxygen demand
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