Szukana fraza: [Abstract = In the years 1934\-1937 during the construction of fortifications, the socalled. Line Dams Niesłysz\-Obra, then Frontly Fortified Odra Warta curve\(southern section\), the river Ołobok was much rebuilt. As a result of these actions was created \?System 600\?, it comprised the following\: eight floodplains, six sections of strategic channels and many dams and bridges.]

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