this is the old tunnel. This was made using the "dig and blast" technique, while the other one was made using the austrian method, using an electronic gadget to bore a hole in the mountain.
theliftchannel 1 year ago
this is the old tunnel. This was made using the "dig and blast" technique, while the other one was made using the austrian method, using an electronic gadget to bore a hole in the mountain.
theliftchannel 1 year ago