A.連梁 B.過梁 C.暗梁 D.邊框梁
A.1 B.2 C.3 D.4
A.Ф10@100/200[Ф12@100] B.Ф10@100/200(Ф12@100) C.Ф10@100/200-Ф12@100 D.Ф10@100/200<Ф12@100>