FIELD: water-development works. SUBSTANCE: young fish and waste contained in water flow 2 are raised by cone of air bubble screen into surface layer, after which they are subjected to artificial separation according to size groups; then each size is drawn off water intake via individual fish-and-waste discharge chutes 4 made of flexible perforated cloths 6 arranged in succession one after another; sizes of perforations of each subsequent perforated cloth reduce in way of flow. EFFECT: enhanced reliability. 2 cl, 1 dwg
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