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slotted spillway bucket
hydroel.st. 齿槽式挑流鼻坎,差动式鼻坎; 齿槽式挑流鼻坎; 差动式鼻坎
tech. 开槽溢洪道消力戽; 开槽溢洪道反弧段; 开槽溢洪道挑流鼻坎