hollow cylinder wall圆筒壁
hollow block wall空心砌块墙体
hollow thin wall gate空腹薄壁大门
hollow masonry wall空斗墙
hollow brick wall空斗砖结构;空心砖墙
hollow thin wall pier空心薄壁墩
hollow shear wall空心剪力墙
hollow curtain wall中空幕墙
no hollow exterior wall无空腔的外墙