短语词组短语wall -slab b structure 墙板结构concrete wall -slab 混凝土墙板shear wall slab 剪力墙板building wall slab 外墙板composite wall slab 复合墙板cs building wall slab cs 外墙板Light Wall Slab 轻质墙板retaining wall slab 挡墙板 返回 wall slab