| 摘要 |
A silo having an Archimedean screw arranged to sweep the floor of the silo to urge material towards a central discharge port of said floor and a support outside said silo having end bearings, to receive ends of the screw shaft which project outside said bearings, to orbit said silo and to carry said screw for sweeping movement without in any way obstructing the discharge port on the floor of the silo.
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