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Hydroelectric Sewer Cover is a kind of electricity-generated and storage communal facilities that based on the principle of hydro power to recycle wasted rain. There will be lots of rain saved on the floor in rainy days. Fortunately, those saved rain are improvable energy. Hydroelectric Sewer Cover has a turbine below the cover, rain will drive the turbine which produce electricity. Every cover is a unit, base station will collect produced electricity by units and convert to stable energy to various parts.