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The Water Wall is a device that can block the flood.When floods come,people stack sand bags into a wall to prevent the flood damage.But the preparation of them is therefore a time-consuming and labor-intensive work.The Water Wall,is a more efficient modular device made from thin rubber.Each module contains 10 rectangular pockets that are connected into a chain.All these10 pockets are able to store water and the first one has a small pump in it.When stacked,the modules can form walls of desired heights and widths.When a flood comes,the water wall can automatically start sucking the water and turns the module into a firm wall to block the flood