The air curtain to a certain extent can replace the automatic throttle mine air curtain, and its safety and reliability is much higher than the automatic throttle. The late 1980s, combined with the underground mine, Northeastern University, the specific circumstances, the application of "effective pressure theory" developed WMI type wide-mouth winds of mine air curtain to replace the automatic throttle cut off transportation roadway leakage. Zibo air curtain | Zibo Blower (certified) | Air curtain 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.