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Six foundation works : first, projects to prevent flood, avoiding huai river overflow again ;
六项基础工程:一是防洪保安工程,切实根除淮河心腹之患;
youdao
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Six foundation works : first, projects to prevent flood, avoiding huai river overflow again ;
六项基础工程:一是防洪保安工程,切实根除淮河心腹之患;
youdao