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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]。該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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