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Tan Delta test
noun
A
test
to
measure
the
degree
of
deterioration
of
an
electrical
insulation
which
is
performed
at
two
temperature
by
applying
AC
voltage
to
the
test
object
and
measure
the
total
current
flow
through
it,
and
separating
and
comparing
the
reactive
and
resistance
portions
of
the
current
passing
through
it.
truck driver's tan
noun
Black and Tans
noun
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