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Das ist Ingenieurbaukunst vom feinsten. Super Video!
good work
It looks good. But also if the bottom sand was frozen or pumped with some material, then could the tunnel be bored through the hardened bottom layer?
Das ist Ingenieurbaukunst vom feinsten. Super Video!
good work
It looks good. But also if the bottom sand was frozen or pumped with some material, then could the tunnel be bored through the hardened bottom layer?