Last Updated：2022/12/24
If well constructed the latter class are most certain as to accurate measurement, but the former possess the advantage of allowing an uninterrupted current of water to pass through, which of course the latter cannot do, as the inlet and outlet valves must alternately be opened and closed to allow each meterful to be discharged and the registering vessel to be refilled.
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If
well
constructed
the
latter
class
are
most
certain
as
to
accurate
measurement,
but
the
former
possess
the
advantage
of
allowing
an
uninterrupted
current
of
water
to
pass
through,
which
of
course
the
latter
cannot
do,
as
the
inlet
and
outlet
valves
must
alternately
be
opened
and
closed
to
allow
each
meterful
to
be
discharged
and
the
registering
vessel
to
be
refilled.
