Noise measurement methods "low-pressure centrifugal fan through the coal mine," the noise measurement method, DK45 main fan, in accordance with national standards through Coal Mine fan and fan noise measurement inlet nozzle method requires the measurement of. Adjust the blade angle. Remove the screws with a wrench on the blades, hand moving blades, southwestern Guizhou fans, the blade angle is adjusted to 0 ° with a wrench to tighten the screws on the blade and tighten to secure. In order to adjust the angle of the blades, blade direction at the same level, angle to be consistent. K45 _ pneumatic blower fan (certified) _ Southwest Guizhou fans by Zibo Blower Factory Co., Ltd. Zibo Blower Factory Co., Ltd. (www.zibo-fengji.com) is a professional "fans, mine fan, mine fan, explosion-proof fan, heat fan, boiler fan" of the company. Since its inception, we adhere to the "good faith, sound management" approach, the courage of healthy competition in the market, so that the "cloud laugh" brand has a good reputation. We adhere to the "service first, customer first" principle, so that the congregation Zibo Blower won the trust of customers in fan, ventilation equipment, and establish a good corporate image. Special Note: This information is for reference only pictures and information, please contact us to obtain the most accurate information, thank you!