6inch Roof Wind Driven Air Turbine Ventilator

Roof wind turbine air ventilator for factory Our Advantages for air Ventilation 1.Long History,High Credit    -- with over 10 years experience on steel&Aluminum; 2.Rice Rources    -- any standard color, any quantity, any size is available; 3.Sound Quality Control    -- with 20 QC to insure our products is exactly what you want; 4. Cost Control and Lead Time Guarantee    -- with monthly output of over 50,000 tons from Group factories. 5.Convenient Transportation   -- within 300km from Shanghai ,Ningbo ,TianjinPort of China.