| 摘要 |
2112231 9322074 PCTABS00027 A chamber (13) has upwardly diverging walls (14a and 14b) so that an upward airstream has different air speeds at different heights in the chamber. When particles such as seeds are put into the chamber, they reach equilibrium at different heights depending on their weights. A horizontal conveyor airstream, much less in magnitude than the upward airstream, directs the classified-by-height particles to a side wall (12b) of the chamber, where they are removed.
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