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Inventia se refera la o combina cu aparat de treier de tip axial. Solutia tehnica prevede o carcasa cu doua corpuri cilindrice în care se afla cîte o toba cu degete radiale. Carcasa este prevazuta cu o gura de preluare a paielor si o gura de avacuare de forma dreptunghiulara, iar degetele sunt dispuse astfel încît sa determine deplasarea masei vegetale sub forma unui strat care avanseaza într-o miscare elicoidala, fiind totodata agitata pentru separarea boabelor din vracul de paie.
Aquatic invertebrates of some Mongolian habitats and their possible significance as food for birds. Results of the Mongolian field trip of ornithologists from the GDR, 1979. 5.).