单项选择题
A.框架柱 B.框架梁 C.圈梁 D.过梁
A.Precast concrete top plate B.The window C.Ring beam D.The reduction
A.The window B.The reduction C.furnishings D.Precast concrete top plate
A.Cast concrete top plate B.Precast concrete top plate C.The window D.The reduction
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