emanuele menietti
@emenietti · 17 févr. 2017
this one doesn't need to stop and provides a continuous tunnelling mode, in some conditions herrenknecht.com/en/products/co… / @elonmusk
Elon Musk
@elonmusk
Yes, but only deep in solid rock, where the walls are self-supporting and concrete reinforcements arguably aren't needed
15:55 · 17 février 2017 · 0 vues
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