Merry entering from collector end axially level Ⅰ impeller speed up the flow direction of the airflow deflected into level Ⅱ host YBT fans, the air flow direction after Level Ⅱ reverse impeller speed up again deflected axially from the diffuser end discharge. Current suddenly increases, the intake fan product of a foreign body attached note, folded duct blockage or bend, are suppressed. FBCD fan, air motor fans (certified), fans are provided by Zibo Blower Factory Co., Ltd. Zibo Blower Factory Co., Ltd. (www.zibo-fengji.com) is an industry leader in Shandong Zibo, fans, ventilation equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Zibo Blower leadership with the staff warmly welcome all inquiries negotiations to create a better future Zibo Blower.