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Ox horn Mountain tunnel
在湖南省古丈县西南部,默戎镇境内牛角山,焦(作)柳(州)铁路上。
全线第二长隧道.
长 4338米,宽5米,高7米。
1971年始建,1979年建成。
系混凝土撑砌单轨铁路隧道。