The air conditioning handing units used double fan, it found the the total volume is not the superimposed volume of the two fans. it was provide a reference for future design.

Abstract: : According to the test of evaporative air handing units, it was consisted of an inertial coarse filter, bag type filter, the hydrophilic polymer fiber filler, double fan.

Zhuang women need double support of the family and society to learn song singing and handing down them.