"build the tunnel they had to drill bore through solid rock" in German To build the tunnel they had to drill / bore through solid rock. Um den Tunnel zu bauen, musste man massiven Fels durchbohren. Detailed translations for "build the tunnel they had to drill bore through solid rock" To build the tunnel they had to drill / bore through solid rock. To build the tunnel they had to drill / bore through solid rock. Um den Tunnel zu bauen, musste man massiven Fels durchbohren.