1.exported to many countries 2. High-efficiency, Low operation cost 3.ISO9001:2000 Certification Feature:impeller is radial backward,with wing--type centrifugal and fixed-loading characteristics,with low power consumption,high efficiency,large air volume,ect. Application: apply to factory dust exhaust and dust collection, air supply of boiler,kitchen pumping fumes,water fall counter pumpong air, ...