| 摘要 |
PROBLEM TO BE SOLVED: To solve the troubles of a straw rack attached to a shaking selector comprising the discharge of the grain-containing screening object in the form of a lump. SOLUTION: The straw rack 11 is provided with a plurality of rack plates 11a, 11b placed in parallel interposing a prescribed gap therebetween. The upper edges of the rack plates 11a, 11b are alternately raised and lowered at intervals of prescribed number of the plates.
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