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People who like Europe's biggest TBM, a Herrenknecht, breaks through for the Santa Lucia tunnel between Bologna and Florence

    Lutz Genscher

    Europe's biggest TBM, a Herrenknecht, breaks through for the Santa Lucia tunnel between Bologna and Florence

    News and photo from Herrenknecht In Italy, the largest tunnel boring machine ever used in Europe successfully completed its drive in June. The supersize borer (Earth Pressure Balance Shield, diameter 15.87 meters) made by Herrenknecht in...