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Discussion :: Tunneling

  1. The length of the needle beam used in needle beam method of tunnelling is usually

    2. A.
    2 m to 4 m
    B.
    2.5 m to 6 m
    C.
    4 m to 7 m
    D.
    5 m to 6 m

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    Answer : Option D

    Explanation :

    No answer description available for this question.

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