Transformers, namely, electrical transformers, electrical current transformers and voltage transformers; starters for fluorescent lamps; rheostats; battery chargers; commutators; converters; electric converters; A/D converters; phase converters; voltage stabilizers; electrical current stabilizers; current rectifiers; buzzers in the nature of electric door bells; electric coils; electromagnetic coils; audio speakers; microphones; megaphones

'a/d':22 'audio':45 'batteri':16 'bell':40 'buzzer':33 'charger':17 'coil':42,44 'commut':18 'convert':19,21,23,25 'current':6,29,31 'door':39 'electr':3,5,20,28,38,41 'electromagnet':43 'fluoresc':13 'lamp':14 'megaphon':48 'microphon':47 'name':2 'natur':36 'phase':24 'rectifi':32 'rheostat':15 'speaker':46 'stabil':27,30 'starter':11 'transform':1,4,7,10 'voltag':9,26

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