(?) (?)湖(Hu)南(Nan)省(Sheng)首(Shou)座(Zuo)大(Da)直(Zhi)径(Jing)((?)外(Wai)径(Jing)11.3m)(?)过(Guo)江(Jiang)盾(Dun)构(Gou)隧(Sui)道(Dao),(?)“(?)蝶(Die)形(Xing)”(?)全(Quan)互(Hu)通(Tong),(?)南(Nan)北(Bei)线(Xian)交(Jiao)错(Cuo)分(Fen)离(Li),(?)巧(Qiao)妙(Miao)解(Jie)决(Jue)与(Yu)既(Ji)有(You)交(Jiao)通(Tong)干(Gan)扰(Rao)难(Nan)题(Ti)。(?)