短語詞組短語voided d slab 空心板cellular voided flat slab 蜂窩式空心樓蓋tubular voided slab 琯式空心板concrete voided slab 砼空心板prestressed concrete voided slab 預(yù)應(yīng)力混凝土空心板voided slab cracks 空心板裂縫voided slab bridge 空心板梁橋的precast voided slab 預(yù)制空心板voided slab beam 空心板梁 返回 voided slab