_ . .._~_
..
..__ . . ._
....
..~__. . . . . . ..=-. . ._..
_.~.
...»_ . . . __.
_ _._ . ._--
..«_.
_.. . . . _ . . . ..=_
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....
..»_.
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..-_. . . . .-.
tunnel
%
we at:
maintenance shaft
xm
%
it's small but you can squeeze through.