Switzerland wants that freight underground, on the railways, and the new tunnel should achieve just that.
瑞士希望这些货物在地下铁路通过,因此要开凿隧道。
Tunnel surrounding rock classification history mainly on railways was introduced and analyzed; the surrounding rock classification is the basic data for tunnel construction.
围岩分级是隧道建设的基础资料,对以铁路为主的隧道围岩分级历史作简要回顾。
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