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来自维基百科，自由的百科全书
上層建築或上層結構、上部結構、附加結構、超結構（英語：Superstructure）指的是在現有結構的基準上向上擴展的結構[1]。该術語適用於各種物理結構，如建築物，橋樑或工程學自由度為零的船舶等。
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