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Anh-Anh
safety valve
US
UK
noun
plural ~ valves
[count] a part in a machine that opens automatically to release steam, water, gas, etc., when pressure becomes too great
something that allows someone to release mental stress and tension in a harmless way
His
hobbies
act
as
a
safety
valve
,
relieving
some
of
the
pressure
he
feels
from
his
job
.
US