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米花岭隧道全长9 392m,是南昆线重要的控制工程。1993年12月份开始全断面开挖,1996年4月开挖全部结束。隧道开挖尺寸为6m(宽)×9m(高)。
The total length of Mihualing Tunnel is 9 392m, which is an important control project on Nankun Line. Full-face excavation started in December 1993 and excavation ended in April 1996. Tunnel excavation size of 6m (W) × 9m (H).