Motors, electric, other than for land vehicles; Electric motor-driven fans and fans for machine engines, electric ventilating fans for motors and engines, and blowing machines for compression, exhaustion and transport of gases, all included in this class; Structural parts for the aforesaid goods, In particular ventilating fan wheels, ventilating fan blades, Fan wheels, Fan blades, Blower housings, Inflow nozzles, outflow nozzles, diffuser housings