短語詞組短語ribbed concrete floor 肋梁樓蓋ribbed slab floor 密肋樓板ribbed d floor 密肋樓板two -way ribbed slab floor 雙向密肋樓蓋結構體系multi -ribbed floor 密肋樓蓋monolithic ribbed floor 肋形結構prestressing ribbed floor 預應力密肋樓蓋ribbed floor slab 肋形樓板ribbed d slab floor 密肋樓板 返回 ribbed floor