太行山隧道是目前我国设计的最长山岭铁路隧道。
Taihangshan tunnel is currently the longest mountain railway tunnel in China.
背景材料：这条33.5英里长的铁路隧道连接北海道与本州岛。
Background: This 33.5-mile-long rail tunnel links the island of Honshu with the island of Hokkaido.
对单线铁路隧道全环整体模筑衬砌台车和施工工艺进行了研究。
The platform and the construction technology for full-circular monolithic lining are studied.
铁路经隧道从大山下面通过。
他们在为新铁路开凿一条通山隧道。
They are digging a tunnel through the mountain for the new railway.
铁路增建第二线、公路拓宽等工程的改造施工，近距离增建隧道是困难的。
During remoulding the railway and the highway, there are many difficult with small distance construction.
铁路增建第二线、公路拓宽等工程的改造施工，近距离增建隧道是困难的。
During remoulding the railway and the highway, there are many difficult with small distance construction.
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