Fans driver must after training qualified certificates. Forced ventilation: The equipment is located at the entrance DK45 system fan, fresh air fan pressure by means of force into the well, and to overcome the resistance of the mine tunnel, is discharged from the air shaft. Tornado aircraft DK40, explosion main fan (certified), Dali fans 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.