A.梁格組隊→甲板組隊→焊接 B.布置墊墩→梁格組對→甲板組對→焊接 C.甲板組隊→梁格組對→焊接 D.清理場地→拼板→劃線→梁格組對→焊接
A.每個井口0.5mm B.每個井口1mm C.每個井口1.5mm D.每個井口2mm