Portable axial flow ventilation is a large airflow, high efficiency, reliable structure and precision desigh product. It is durable and easy moving for  match with flexible hose of different length specification, it can easily and quickly exhaust the air to  somewhere else. 
  　The product is applicable to many type of works, such as mining, architecture, civil administration, environmental protection, chemical industry,mechanical processing, etc. It can be used as ventilator in place with powder and ducts, harmful gas, closed space, especially fits for the requirements of wind withstanding, sun-shine and rain withstand for all outdoor workings, and it is a necessity for labor protection.