TY JOUR TI TO THE CHOICE OF THE RATIONAL PARAMETERS OF THE POTATO DIGGERROTOR SEPARATOR KW potato harvesting KW tuberdamageability KW potato harvesting digger KW working parts KW optimization KW parameter JO Bulletin of KSAU AU Ostroumov, S.S. AU Kuzmin, A.V. PY 2014 IS PB Krasnoyarsk State Agrarian University