TY JOUR TI THE ROTARY DRUM MIXER OPERATION PROCESS MODEL AND THEORETICAL JUSTIFICATION OF ITS PARAMETERS KW mixing KW uneven KW spiral KW pipeline KW power consumption KW mixing JO Bulletin Samara State Agricultural Academy AU Dimitriev, N.V. AU Konovalov, V.V. AU Teryushkov, V.P. AU Chupshev, A.V. PY 2017 IS 2 PB Samara State Agrarian University