What Became of the Pioneer Tunnelers Who Excavated the M-30: Tizona, Retired, and Dulcinea, on Mission in Poland

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When it is working at full capacity, Mayrit (the name given to Madrid by the Arabs for the richness of its groundwater), the tunneller who will be in charge of drilling the subsoil of the capital to expand the line 11 of Metro, will advance at a daily rate of 15 meters, "seven or eight times" faster than the traditional construction techniques. This 'top', designed specifically to adapt to the geotechnical and geological characteristics of the l…