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Discussion :: Tunneling

  1. In the wooded bulk-head, used for mucking in steep grade tunnels,

  2. A.
    one opening is provided
    B.
    two openings are provided
    C.
    three openings are provided
    D.
    no opening is provided.

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    Workspace

    Answer : Option B

    Explanation :

    No answer description available for this question.


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