The company has started the development of special draught fan since 1983. After the introduction of design techniques from Shanghai 704 Research Institute, it has provided the cooling fans for the elevator traction motor for Switzerland Schindler (Shanghai) Company and America Otis (Tianjin) Company. After more than 30 years of development, it has cultivated many profession technical staff and built a strong team. After developing advanced products, it is now the exclusive supplier of special draught fans for international group companies such as ABB, SEW and Siemens etc. A series of processing and inspection equipments for draught fan are manufactured as well, and its test room of draught fan has passed the national laboratory accreditation.