藝術與建築詞典根目錄
....物件層面
........組件 (層級名)
............成分
................<依特定背景區分之組件>
....................建築元素
........................<結構元素與結構元素構造>
............................<結構元素構造>
................................<拱券、圓頂或拱頂構造>
....................................拱肋
|||........................................對角肋條
|||........................................架空肋條
|||........................................枝肋
........................................脊肋
|||............................................縱脊肋
|||............................................橫脊肋
|||........................................居間拱肋
|||........................................橫肋架
|||........................................牆肋
|||....................................拱冠