| 摘要 |
A gate is constructed to include a casing mounted in the ground of a gateway entry, two hollow posts fixedly fastened to two opposite sidewalls of the gateway entry and connected to the ends of the casing, an inflatable shutter received in the casing, an air pump selectively controlled to pump air into/out of the inflatable shutter, and detector switch means adapted to drive the air pump to pump air into the inflatable shutter, for lifting the inflatable shutter between the hollow posts to stop the flow of water upon a flood of rain.
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