A.平拱磚過(guò)梁 B.弧拱磚過(guò)梁 C.鋼筋磚過(guò)梁 D.鋼筋混凝土過(guò)梁
A.180mm;360mm B.180mm;365mm C.178mm;360mm D.178mm;365mm
A.120mm B.115mm C.110mm D.125mm