Axial - flow ventilation fan is applicable to canging air ordissipating hear at such places as metal lurgical factory , steel rolling mill , chemical plant , refrigerating chamber , restaurant , grain depot , cultivating field , tunnel , storehousr , residence , ect . while removed the shell , it in the long echaust pipe with series connection method . the fan has complex structure , low noise , wide power selective range 72型离心通风机可作为工三及大型建筑的室内通风换气，还可作输入气体，输送空气或其它不自燃的对人体无害的，对钢铁材料无腐蚀性的气体，气体温度不得超过80 。
