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Cover your tracks

本贴由 admin 于 2011-02-15 发布. 版块名称: On Track.

  1. admin

    admin Founder Administrator

    注册日期:
    2005-03-16
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    职业:
    Founder National Preservation
    所在地:
    dover
    Heritage Railway Volunteer:
    Yes I am an active volunteer
    More stringent European safety regulations now stipulate that new railway tunnels have to be designed as two separate single-track bores. Furthermore the track system must take into account the need for road vehicles to access the line in case of emergency. Double-track tunnels currently under construction are also being built with such vehicular access in [...]

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    admin, 2011-02-15
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