The Most Powerful Digging Machine Ever Built!

Operators perform a delicate dance, maintaining precise underground pressure. If they make a single mistake, it won’t only cost money; it would also cost lives. If the pressure is too low, the ground above collapses; too high, it jeopardizes the structural integrity of the tunnel.
The job is full of surprises and there is no such thing as a routine. So why do these operators show up to work everyday?
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