短语词组短語floor r slab 地台hollow floor -slab 空心樓板floor plug slab 地板structure floor -slab 結搆樓板floor -slab 樓麪板spot -cast concrete floor-slab of house 住宅現澆樓板cast -in-situ floor-slab 現澆樓板ribbed floor slab 肋形樓板 返回 floor slab