Category:遊水池と調整池
治水目的で設置された遊水池(遊水地)および調整池(調節池)のカテゴリ。
関連カテゴリ - Category:ダム
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治水目的で設置された遊水池(遊水地)および調整池(調節池)のカテゴリ。
関連カテゴリ - Category:ダム
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