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machine parts, namely, starter and brake resistors with forced ventilation or natural cooling, changeover switches and selectors; electrically operated earthing brushes being parts of machines; wheel flange lubrication machines; electromagnetic brakes beings parts of machines; direct current traction network supply sub-stations comprised of AC to DC and DC to AC converters, sold as a unit

electromechanical and electronic tachometers and tachographs for vehicles; electronic speed and distance recorders for vehicles; electronic speedometers, odometers and distance displays for vehicles; electrical and optical pulse generators; computers; rectifiers equipped with semiconductor devices; inverters, converters, and power electronic circuits for transforming electrical energy from AC to DC or vice versa; surge protectors; grounding switches, and circuit breakers; pantographs and current pick-ups for vehicles

locomotives and railway, tramway and trolley cars and automatic and manual couplings and structural parts therefor

periodicals, namely, newsletters and business reports featuring electrical and mechanical engineering; publications, namely instruction manuals, leaflets, and operating instructions featuring electrical and mechanical engineering

construction and repair of DC traction network and supply sub-stations

education services, namely, conducting courses and seminars in the fields of electrical and mechanical engineering

design of DC traction network supply sub-stations for others