(57) Abstract This invention being concatenated mutually in parallel in regard to the collapsible dam in order you suppress and to adjust the water flow inside such as canal and harbor, the floodgate of 1 or more where it expands effectively to the vertical consists of (3). This floodgate (3) each distribution facilities is done on front and back, mutually consists of the wall (31,32,33) of 2 or more where sleeve unrestrictedly it is concatenated to the conclusion by the guide element (231,232,233), the above-mentioned wall does paralleling to the common extended shaft (34), mutually the thrust means which sleeve unrestrictedly exercise also (5) working.
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