Last Updated：2025/12/30
Sentence
Sandhogs
working
behind
a
hydraulic
shield
excavated
the
riverbed
silt
inch
by
inch
and
installed
linking
sections
of
cast-iron
tubes
as
they
went.
The
digging
chamber
was
filled
with
compressed
air
pumped
in
from
the
surface.
The
work
was
dangerous.
The
men
who
did
the
work,
the
sandhogs,
were
considered
heroes.
Quizzes for review
Sandhogs working behind a hydraulic shield excavated the riverbed silt inch by inch and installed linking sections of cast-iron tubes as they went. The digging chamber was filled with compressed air pumped in from the surface. The work was dangerous. The men who did the work, the sandhogs, were considered heroes.
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