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English

In the 1870s, John D. Brunton of England built a machine employing cutting discs that were mounted eccentrically on rotating plates, which in turn were mounted eccentrically on a rotating plate, so that the cutting discs would travel over almost all of the rock face that was to be removed.

Norwegian

I 1870-årene bygget John D. Brunton i England en maskin med skjæreplater som var montert eksentrisk på roterende plater, som i sin tur ble montert eksentrisk på en roterende plate, slik at kutteplatene ville dekke over nesten alt fjell som skulle fjernes.