藝術與建築詞典根目錄
....材料層面
........材料 (材料層面)
............材料
................<依成分區分之材料>
....................有機材料
........................瀝青材料
............................<天然瀝青材料>
................................焦瀝青
....................................煤
|||........................................無煙煤
|||........................................煙煤
|||........................................燭煤
........................................褐煤
|||............................................煤玉 (煤)
|||....................................泥煤