Sewage stream when it rains or when automatically bright ditch is flowed back and the smell of manhole cover is blocked to be provided by beginning and end valve. Manhole cover flows back for sewer and odor barrier, according to an embodiment of subject innovation, top surface and multiple discharge orifices, it is formed in a predetermined space, there is a lower surface sewer and corresponding frame and opening for beginning and end, it is formed to be open, including beginning and end.
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