"220V AC Cooling Fan" gas delivery if there is flammable, explosive characteristics, will have to select the proof fan; gas cooling fan delivery or if it contains a lot of dust transport coal, to select dust, dust emission, coal Pink cooling fan; gas cooling fan to be delivered when there is a relatively strong corrosive, to select corrosion fan; work or transport high-temperature gas at high temperature, high temperature fans to choose. After "220V AC Cooling Fan" uses to determine, based on the performance requirements of the cooling fan, cooling fan first determine the grade, the decision is the choice of domestic or imported cooling fan cooling fan. Then, to do the right cooling fan manufacturer specific grade basic understanding of information cooling fan manufacturer to determine production capacity, product quality, product specifications, product price, but also consider the "220V AC Cooling Fan" of environmental standards.