Original Patentschrift - Ch. Gilliéron in Viége / Visp , 1902 , Gesteinbohrmaschine , Bergbau , Tunnelbau !!!

Original Patentschrift - Ch. Gilliéron In Viége / Visp , 1902 , Gesteinbohrmaschine , Bergbau , Tunnelbau !!! - Tools
Original Patentschrift - Ch. Gilliéron In Viége / Visp , 1902 , Gesteinbohrmaschine , Bergbau , Tunnelbau !!! - Tools
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