短語詞組短語empty cavity behind wall 壁后空硐cavity shaft wall 空心風(fēng)道墻cavity filler wall 空腔砌體cavity sandwich wall 空腔結(jié)構(gòu)dental cavity wall 牙窩洞brick -cavity wall 雙層空心墻cavity wall thickness 型腔壁厚cavity wall building 空斗墻房屋masonry cavity wall 中空砌塊墻 返回 cavity wall