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Plungers
[plʌndʒəz]
例句/造句/用法:
Water
is
supplied
to
the
two
plungers
under
a
pressure
of
7,000
pounds
per
square
inch
,
giving
it
a
maximum
capacity
of
15,000
tons
.
佚名.
神奇的知識之書
.
錄入:斯威尼