Model 4-72¢òseries of centrifugal ventilators are
the new-type high-efficiency blowers optimized and improved under
the basis of 4-72 centrifugal ventilator.It has the similar purpose
with 4-72 series.Its feature is that,while the blower is at the
condition of high pressure(high wind-net resistance),the wind quantity
shall increase 20% more than the 4-72 series.In the same time,some
derived series are added for the customer's flexible choice.
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