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| Keywords: Druckluft Bohrmaschine.jpg Druckluft-Bohrmaschine System Ferroux simplifié aufgenommen in Göschenen vor der Werkstatt nach 1875 Macchinario usato per la perforazione del Traforo del Gottardo completato nel 1882 Unser Gotthard Lüönd/Iten unknown upload by Adrian Michael PD-old Gotthard rail tunnel 1880s Historical images of the Gotthardbahn 1880s Drilling jumbos Rock drills Pneumatic tools | ||||
