The products have passed many authoritative certifications from China and some other countries. Some have won national invention patents and utility model patents. The main products, small power frequency fans, named “Delibang” makes extraordinary achievements in agricultural drying, heating and ventilation, metallurgy, chemical industry, boilers, stoves, environmental fresh air and so on. Especially, our company, an elite of the industry, have gained a great market share in the field of special combustion fans for tobacco drying equipment and become one of the drafting units of the national tobacco fans standard. https://www.chinablowerfan.com/product/axial-fan/sf-portable-exhaust-fan/sf-portable-exhaust-fan.html