Editor's Desk

TBMs have become fantastic factories but, trouble with a TBM is trouble all around - there is nowhere to hide. With all parties wanting to have influence on TBM design and operation, a continuing conundrum is where does responsibility for trouble lie and is TBM risk sharing a feasible concept.
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Gall Zeidler Herrenknecht AECOM USA Hany BabEng VMT CRCHI Normet Tsurumi Pumps