FIELD: hydraulic engineering. SUBSTANCE: device has a flange and disk located in parallel to one another and interconnected with rods. The rods are threaded or has multiple cuts through all the length. The flange is drilled in the center and secured to water intake head of the hydraulic construction or a pump. Water of a reservoir passes between strings and through the central opening in the flange is taken to users, and yang fish blocked with the strings. EFFECT: yang fish saving. 2 dwg
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