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maa-aluse voolukanali püstasendis põlvjas käänak, a knee-shaped bend in the vertical plane of the channel of an underground karst river, коленообразный изгиб в вертикальной плоскости канала подземной карстовой реки
sifón . Limnoloogia sõnastik. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//lim/sif%C3%B3n/1/spa (20.06.2026)
