TY JOUR TI ANALYTICAL DESCRIPTION OF THE MIXER PERFORMANCE FOR BULK MATERIALS WITH SCREW BLADES KW mixer KW mixing KW blade KW frequency KW crew JO Bulletin Samara State Agricultural Academy AU Borisova, M.V. AU Novikov, V.V. AU Konovalov, V.V. PY 2019 IS 4 PB Samara State Agrarian University