元となった辞書の項目
ballast tank
名詞
One
of
several
external
or
internal
tanks
fitted
in
submarines;
when
filled
with
seawater
they
allow
the
boat
to
submerge;
when
emptied
using
compressed
air
buoyancy
is
restored
and
the
vessel
rises
towards
the
surface.
Auxiliary
ballast
tanks
within
the
pressure
hull
allow
the
submarine
to
be
trimmed.
日本語の意味
潜水艦などに装備される、外部または内部に設けられたタンク。海水で満たすと潜航可能になり、圧縮空気で海水を放出して浮力を回復し、浮上する。 / 船体の傾き（トリム）を調整するために利用される補助バラスト槽。
意味（1）
One
of
several
external
or
internal
tanks
fitted
in
submarines;
when
filled
with
seawater
they
allow
the
boat
to
submerge;
when
emptied
using
compressed
air
buoyancy
is
restored
and
the
vessel
rises
towards
the
surface.
Auxiliary
ballast
tanks
within
the
pressure
hull
allow
the
submarine
to
be
trimmed.
（ plural ）
