元となった辞書の項目
air admittance vent
noun
(plumbing)
a
mechanical
sewer
vent
that
allows
air
to
enter
into
the
sewage
system
but
does
not
allow
exhaust
of
sewer
gases,
to
aid
the
flow
of
sewage
by
providing
air
behind
water,
where
a
standard
vent
stack
to
atmosphere
is
not
possible,
by
drawing
in
interior
air
but
keeping
harmful
sewer
gases
contained.
意味（1）
(plumbing)
a
mechanical
sewer
vent
that
allows
air
to
enter
into
the
sewage
system
but
does
not
allow
exhaust
of
sewer
gases,
to
aid
the
flow
of
sewage
by
providing
air
behind
water,
where
a
standard
vent
stack
to
atmosphere
is
not
possible,
by
drawing
in
interior
air
but
keeping
harmful
sewer
gases
contained.
