| 摘要 |
Equipment to achieve retardation of inflow into circular or polygonal sedimentation tanks, final sedimentation tanks, and thickeners in sewage treatment plants is provided through the use of circular or polygonal self-supporting structures one or more arranged around the central inlet pipe and reaching into the liquid depths. Other improvements regard to preferable modes of the retardation center well and floats as well as to their arrangement to each other as well as to their location in the tank.
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