TY JOUR TI THE SUBSTANTIATION OF THE RATIONAL LEVEL OF THE TECHNOLOGICAL MACHINE RELIABILITY IN THE GRAIN-HARVESTING PROCESS KW reliability KW combine harvester KW productloss KW efficiency JO Bulletin of KSAU AU Shepelev, S.D. AU Cherkasov, Y.B. PY 2015 IS PB Krasnoyarsk State Agrarian University