TY JOUR TI RESEARCH ON PNEUMATIC CONICAL SEPARATOR KW grain heap KW cone pneumatic separator KW grain cleaning KW air flow JO Vestnik of Omsk SAU AU BEGUNOV, M.A. AU CHERNYAKOV, A.V. AU KOVAL, V.S. AU KOROSTELEV, D.N. PY 2024 IS 54 PB FSBEI HE Omsk SAU