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(Environmental Engineering) A film of microorganisms attached to a surface, such as that on a trickling filter, rotating biological contactor, or rocks in natural streams.
(Environmental Engineering) An attached growth biological process in which the microbial film is attached to non-moving rock or plastic media.
bamboozle,con,deceive,dupe,swindle,trick
หลอกลวง
arduous,awkward,challenging,demanding,difficult,grueling,problematic,tough,tricky,troublesome
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