Industry
Blowers, axial flow (helicoidal), Heating, ventilation, air conditioning (HVAC) and refrigeration equipment, Construction, Fans, engine driven, Fans, tangential or cross flow, Industrial blowers, Fans and ventilators, radial (centrifugal), Fans, noiseless, variable flow, industrial, Fans and ventilators, axial flow (helicoidal), Fans, portable, industrial, electric