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Continue to Chat小学生の腰痛 千葉市教委が実態調査|チバテレ https://blog.40ch.net/2018/06/25/back-pain-of-primary-school-student-chiba-city-board-of-education-survey/
小学生の腰痛 千葉市教委が実態調査|チバテレ https://blog.40ch.net/2018/06/25/back-pain-of-primary-school-student-chiba-city-board-of-education-survey/