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>
....................<測量設備元件>
........................<時計組件>
............................<鐘錶組件>
................................指針
|||....................................時針
|||....................................分針
|||....................................秒針 (時鐘)
|||................................擺卡板