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検索内容:
overhead engine
Cornish engine
noun
ether engine
locating engineer
noun
engine lathe
noun
man engine
noun
A
mechanical
lift
for
raising
or
lowering
people
through
considerable
distances;
specifically
(mining)
a
contrivance
by
which
miners
ascend
or
descend
in
a
shaft.
It
consists
of
a
series
of
landings
in
the
shaft
and
an
equal
number
of
shelves
on
a
vertical
rod
which
has
an
up
and
down
motion
equal
to
the
distance
between
the
successive
landings.
A
man
steps
from
a
landing
to
a
shelf
and
is
lifted
or
lowered
to
the
next
landing,
upon
which
he
then
steps,
and
so
on,
travelling
by
successive
stages.
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