検索結果- 英語 - 英語
検索内容:
pulley
noun
(engineering,
countable)
One
of
the
simple
machines;
a
sheave,
a
wheel
with
a
grooved
rim,
in
which
a
pulled
rope
or
chain
lifts
an
object
(more
useful
when
two
or
more
pulleys
are
used
together,
as
in
a
block
and
tackle
arrangement,
such
that
a
small
force
moving
through
a
greater
distance
can
exert
a
larger
force
through
a
smaller
distance).
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