| 摘要 |
A hopper bottom for a grain bin consisting of a precast concrete cylinder having a continuous side wall, a top wall and an open bottom. The top wall is funnel shaped and depends from the side wall. The funnel shaped top wall has an extremity terminating in an opening. The side wall has at least one opening sealed by a removable closure. A precast concrete bottom closure is positioned in the bottom of the concrete cylinder. The concrete bottom closure is secured to the concrete cylinder by brackets.
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