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Drainage is one of the issues that are on the rise globally. for example, bad smell due to the influx of trash and reverse flow of rainwater occurs, skin diseases such as atopic induction by this happens. And I cause problems unsanitary due to the influx of rats and insects. In order to prevent this,we have designed a product that can avoid this problem. There is also an effect that reduce the dredging cost cleaning and prevent the inflow of wastewater, such as fallen leaves and debris on the road, suppress the generation of a variety of pests.