cast-in-place hollow ceiling 现浇砼空心楼盖
cast-in-place hollow floor 现浇空心楼面
cast-in-place hollow floor slab 现浇空心楼板
Hollow cast-in-place concrete floor 现浇
cast-in-place dense rib hollow ceiling 现浇密肋空心楼盖
Cast-in-place hollow-core flat slab 现浇空心板无梁楼盖
cast-in-place concrete hollow floor 现浇空心楼板
cast-in-place circular hollow floor 现浇圆形管空心楼盖
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