... ).three power choices 4).easy operation,low loss Grain threshing machineThis grain threshing machine is with the most versatile functions. ... the livestock breeding,small farm,small feed producing company,grain and cooking oil processing factory,wind plant,chemical plant ... drum rotate speedwheat(920r/min) grain(800r/min)draught fan rotate speedwheat(2450r/min) grain(2200r/min)work efficiencywheat≥240Kg/ ...