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  "abstract": "A rainwater storage device includes a plurality of water storage pipes buried in a ground, the water storage pipes each having a rainwater inflow port on a surface of a ground; and a lower connecting pipe that connects bottom part regions of the plurality of water storage pipes. The plurality of water storage pipes is arranged in a plurality of rows and columns, extending in a longitudinal direction and a lateral direction, respectively, and the lower connecting pipe is arranged in an inclined state toward one water storage pipe out of the plurality of water storage pipes.",
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  "title": "Rainwater storage device and construction method thereof",
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