Report - 黄河文化中的 开封“两奇” - kfrb.kf.cnkfrb.kf.cn/tplimg/1/2020-02/19/11/2020021911_pdf.pdf · 符至仪封（今属兰考）黄陵冈的黄河淤道，大大 减轻了黄河在开封一带河段的灾害。宣德十年

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