| 摘要 |
In an underwater building comprising a base to be fixed at the bottom of the water or the sea and a building body to be constructed on the base. the base rises to the water surface before completing of the building body, and the building body has double construction having an opening between an outside wall and an inside wall, and water is poured and drained in and from the opening, or by a prepared weight the building body is sunk in the water, and only a gateway tower portion made in the upper portion of the building body is out of the water.
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