DecaDrillingFluid® - Technology for Tunneling0 pages
separation & process
On a drawing still preserved to this day,
Leonardo da Vinci (1452-1519) sketched
a large-sized helical propeller,
which would - Leonardo hoped drill itself into the ground by mechanics
and rotation, and even make flying
objects soar to the sky.
rotating - advancing
mechanically - hydraulically
Centrifuge technology for
tunnel construction