Systems and equipment for aerating water and wastewater, comprising air diffusers for aerating water and wastewater, diffuser membranes for aerating water and wastewater, and diffuser assemblies comprising diffuser bodies and retaining rings for mounting air diffusers and diffuser membranes to pipes

'aerat':5,13,20 'air':10,35 'assembl':26 'bodi':29 'compris':9,27 'diffus':11,17,25,28,36,38 'equip':3 'membran':18,39 'mount':34 'pipe':41 'retain':31 'ring':32 'system':1 'wastewat':8,16,23 'water':6,14,21

'coupl':5 'metal':3 'non':2 'non-met':1 'pipe':4

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