www.minearc.com y Case Study: Another Win in Doha as Herrenknecht Strikes Gold TBM manufacturer Herrenknecht has been awarded the fourth and final section of Phase One of the Doha Metro Project, an integral part of the Qatar Rail Development Program (QRDP). In addition to the German manufacturer’s supply of 15 tunnel boring machines (TBMs) for the first three sections of Phase One, they have now been awarded the final section, dubbed the Gol

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