Recent office automation equipment is generally designed for high density apckaging and dissipates much heat.Therefore,it is oftne constructued so that air from blowers and ans is passed therough a duct leading to the outside of the equipment.In additin,sicne severe design restrictions are placed on exhaust route and their outlets,there shpaes are often far form ideal.Their shape fotne does not account for acoustics and fluid mechanics.In aprticular,air from the blosers fotne cannot be directory exahusted onto outside.It is therefore necessary to bend the duct near the outlet at an acute angle.
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