The flow rate of the secondary air is thus controled, and the excess air is restricted to minimum so as to decrease the fuel consumption of the furnace.
由此控制二次风量大小，以保持最低过剩空气量，达到节能目的。
The flow rate of the secondary air is thus controled, and the excess air is restricted to minimum so as to decrease the fuel consumption of the furnace.
由此控制二次风量大小，以保持最低过剩空气量，达到节能目的。
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