Shandong Zhongrun Machinery Co.,Ltd, ( "12-Year Experience In Production And Export. Quality Gain The Market!") has established an production system including the product exploitation, development, project design, type chosen, installation and service. All the new products are stringently tested and repeatedly experimented with to guarantee product quality. It is produces a wide range of the external industrial exhaust fan ,centrifugal fan, heavy hammer fan, roof fan, ventilation exhaust fan cooling pad and heat boiler etc. The products are extensively applied to industrial factory,poultry farm, greenhouse and so on.