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reservoir engineering in ancient China
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reservoir engineering in ancient China
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古代水库工程
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reservoir engineering in ancient China
古代水库工程
中国古代为实现灌溉、防洪、航运、军事等目标而兴建的蓄水工程。
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Ruaha National Park
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Ruan Yuan's Catalog of Inscriptions on Sacrificial Vessels
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Ruapehu Volcano
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Ru-based superconductor
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