An automatic opening and closing gate for maintaining desired upstream water level in waste weir spillway river canal dame or the like reservoirs

• 1. 一种汛期降低上游雍水的迷宫堰叠水鱼鳞坝 [P] . 中国专利： CN211898206U . 2020-11-10
• 2. 一种可降低上游雍水高度的折线型堰坝 [P] . 中国专利： CN209555870U . 2019.10.29
• 3. An automatic opening and closing gate for use in water or spillway of dam water storage reservoir river canal and the like to maintain a desired upstream water level [P] . IN175753B . 1995-08-26

  机译： 用于在大坝蓄水库河道等的水或溢洪道中使用的自动打开和关闭闸门，以维持所需的上游水位

• 4. AUTOMATIC GATE FOR MAINTAINING CONSTANT UPSTREAM WATER LEVEL IN RESERVOIRS,WATERSTREAMS,CANALS AND THE LIKE [P] . IN167470B . 1990-11-03

  机译： 自动闸门可保持水库，水流，运河和类似区域的恒定超水位

• 5. An automatic gate for maintaing constant upstream water level in reservoirs water streams canals amp; the like having tail water back elect situation [P] . IN176929B . 1996-10-05

  机译： 一种自动闸门，用于在有尾水回注情况的水库水渠等中保持上游水位恒定

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