A guide hole for discharging crushed grain is drilled in the caked grain by applying impact and rotation to the rotary blades of the drilling machine by {HEAD ~ use} of {TAIL ~ compressed air}, and after the guide hole has been drilled, crushing is carried out with the crusher 
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A guide hole for discharging crushed grain is drilled in the caked grain by applying impact and rotation to the rotary blades of the drilling machine by { HEAD ~ use } of { TAIL ~ compressed air } , and after the guide hole has been drilled , crushing is carried out with the crusher
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