Ventilation and air movement equipment, namely, air impellers for ventilation; Electric motor-driven fans, ventilating fans for industrial use, and blowing machines in the nature of electric fans for ventilation and air moving systems for industrial use; parts for the aforesaid goods, in particular ventilating fan wheels, ventilating fan blades, fan wheels, fan blades, blowing machine wheels, blowing machine housings, inflow nozzles, outflow nozzles, diffuser housings; fittings for the afores...