mechanisms complex protective structures during flood protection kronstadt russia |
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| navigate by keyword : technology sky finland building protection surge industrial engineering baltic sea saint petersburg defenses structures landscape caissons road navigable vessels tunnel transportation transport construction gulf floating top gates protective underwater flood water prevention kronstadt complex russia barrier navigation dam channel open finnish shutter storm hydrotechnical summer vehicles |
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| Mechanisms of a complex of protective structures during a flood. Flood protection. Kronstadt |
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