Complex sentence: However, with the start of dieselisation in 1950s and speeding up of electrification from 1960s the face of railways started changing.electric locomotives, compared to steam locomotives, required more number of items which were sophisticated and had to be purchased.
Split into simpler sentences: However, with the start of dieselisation in 1950s and speeding up of electrification from 1960s, the face of railways started changing. Electric locomotives, compared to steam locomotives, required more items that were sophisticated and had to be purchased.