| 摘要 |
A pivotally mounted apertured plate gate swings automatically downward to restrict flow in a canal with increasing water flow and automatically swings upwardly as canal flow decreases so as to maintain a generally constant head downstream in the canal. The automatic action is accomplished through the cooperation, with the apertured plate, of a plate counterweight structure, valved tank for receiving water through the plate aperture, and a sliding blade gate controlling inflow through the plate aperture. Manual control is also possible.
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