Complex sentence: These 25kV locomotives were built in the Novotšerkassk locomotive factory, Soviet Union, from 1973 onwards until 1985, with electrical equipment supplied by the Finnish company Oy Strömberg Ab (later part of ABB).
Split into simpler sentences: These 25kV locomotives were built in the Soviet Union at the Novotšerkassk locomotive factory between 1973 and 1985. Electrical equipment for the locomotives was supplied by the Finnish company Oy Strömberg Ab (later part of ABB).