Dangos 1 - 3 canlyniadau o 3 ar gyfer chwilio '"Tunnels"' Mireinio'r Canlyniadau
  1. 1
    Cyhoeddwyd 1996
    Pynciau “...Tunneling Safety measures....”
    Llyfr
    Ychwanegu at ffefrynnau
    Wedi'i Gadw mewn:
    Safety of New Austrian Tunnelling Method (NATM) tunnels : a review of sprayed concrete lined tunnels with particular reference to London clay.
  2. 2
    Cyhoeddwyd 2000
    Pynciau
    Llyfr
    Ychwanegu at ffefrynnau
    Wedi'i Gadw mewn:
    The collapse of NATM tunnels at Heathrow Airport : a report on the investigation by the Health and Safety Executive into the collapse of New Austrian Tunnelling Method (NATM) tunnels at the Central Terminal Area of Heathrow Airport on 20/21 October 1994.
  3. 3
    Cyhoeddwyd 1974
    Pynciau
    Llyfr
    Ychwanegu at ffefrynnau
    Wedi'i Gadw mewn:
    Report on roads in tunnel for the Greater London Council /

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