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| The tunnel of Daban Mountain |
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| The tunnel of Daban mountain is1530 meters long, 8.5 meters net wide, 4 meters high, shortens 5.2 km mileage, it is ranked first for its elevation in Asia, second in the world; it is the first tunnel with windbreak and hot insulation door at the entry, and adopts and implements the advanced anti-freezing, anti-leakage measures by far. |
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