六项基础工程：一是防洪保安工程，切实根除淮河心腹之患；

Six foundation works : first, projects to prevent flood, avoiding huai river overflow again ;

youdao

六项基础工程：一是防洪保安工程，切实根除淮河心腹之患；

Six foundation works : first, projects to prevent flood, avoiding huai river overflow again ;

youdao