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3.4 Summary
中國(guó)大運(yùn)河技術(shù)史

        South Canal enables all branch streams of southern system of HaiheRiver to be communicated as the trunk stream of southern system ofHaihe River and still plays a role in preventing flood,draining floodedfields and the like even today.In Yuan,Ming and Qing    （共 2515 字）     [閱讀本文] >>

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