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2022-12-11. "Reiwa Gan Nendo Suiyoku Shīzun-chū Suishitsu Chōsa Kekka" 令和元年度水浴シーズン中水質調査結果 [2019 Bathing Season Water Quality Survey Results] (PDF) (in Japanese)...
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3 KB (360 words) - 09:29, 18 October 2023