Complex sentence: In Denmark and Finland 50 Hz is used for the main lines (if electrified) and the electricity comes from general suppliers, and much simpler equipment than in Sweden and Norway is needed for conversion.
Split into simpler sentences: In Denmark and Finland, 50 Hz is used for the main lines (if electrified) and the electricity comes from general suppliers. As such, much simpler equipment than in Sweden and Norway is needed for conversion.